JPH0313171B2 - - Google Patents
Info
- Publication number
- JPH0313171B2 JPH0313171B2 JP60266865A JP26686585A JPH0313171B2 JP H0313171 B2 JPH0313171 B2 JP H0313171B2 JP 60266865 A JP60266865 A JP 60266865A JP 26686585 A JP26686585 A JP 26686585A JP H0313171 B2 JPH0313171 B2 JP H0313171B2
- Authority
- JP
- Japan
- Prior art keywords
- single crystal
- magnetic
- oxide
- refrigeration
- same manner
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は新規な磁性体材料に関し、特に磁気冷
凍作業物質および蓄冷材として好適である磁性体
材料に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a novel magnetic material, and particularly to a magnetic material suitable as a magnetic refrigeration material and a cold storage material.
磁性体の磁気熱量効果を利用する磁気冷凍は、
20K以下の極低温を実現し得るものとして期待さ
れている。この磁気冷凍に用いられる作業物質に
は、磁気モーメントが大きい等の特性とともに、
動作温度領域において熱伝導率が大きいこと、お
よび動作温度領域において数テスラの外部磁場に
対するエントロピー変化が大きいことが求められ
る。このような磁気冷凍作業物質として従来ガド
リニウムガリウムガーネツトGd3Ga5O12（GGG）
単結晶が知られている。しかし、GGG単結晶は
15K以上では外部磁場に対するエントロピー変化
が小さいため、効果的に使用できる温度領域は15
〜1.8Kと狭かつた。一方、デイスプロシウムア
ルミニウムガーネツトDy3Al5O12（DAG）単結晶
は冷却温度領域がより広いものとして知られてい
るが、外部磁場に対するエントロピー変化は余り
大きくないため冷凍出力が小さいという難点があ
る。そこで、20K以下の広い温度領域にわたつて
大きな磁気熱量効果が得られる作業物質が求めら
れている。
Magnetic refrigeration uses the magnetocaloric effect of magnetic materials.
It is expected that it will be possible to realize extremely low temperatures below 20K. The working material used in magnetic refrigeration has characteristics such as a large magnetic moment, and
It is required to have high thermal conductivity in the operating temperature range and to have a large entropy change in response to an external magnetic field of several Tesla in the operating temperature range. Conventional gadolinium gallium garnet Gd 3 Ga 5 O 12 (GGG) as such magnetic refrigeration working material
Single crystals are known. However, GGG single crystal
Since the entropy change due to external magnetic field is small above 15K, the temperature range that can be used effectively is 15K.
It was narrow at ~1.8K. On the other hand, disprosium aluminum garnet Dy 3 Al 5 O 12 (DAG) single crystal is known to have a wider cooling temperature range, but the entropy change in response to an external magnetic field is not very large, so the drawback is that the refrigeration output is small. There is. Therefore, there is a need for a working material that can provide a large magnetocaloric effect over a wide temperature range below 20K.
ところで、極低温生成装置、例えば、スターリ
ング冷凍サイクル等を利用する冷凍機において
は、蓄冷材にヘリウムガス等の冷媒対向流を通流
させて、冷媒を冷却することが行なわれる。この
ような蓄冷材には当然大きな蓄冷能力と高い熱伝
導特性とが要求される。従来、このような蓄冷材
としては船が使用されているが、鉛は10K以下に
おいては、比熱がヘリウムガスよりも急激に低下
するため、蓄冷材としての機能を果し得なくな
り、したがつてこのような冷凍機では20K程度ま
での冷却が限界であつた。そこで、10K以下の極
低温においてもヘリウムガスに比し高い比熱を有
し、蓄冷材として機能し得る物質が求められてい
る。 By the way, in a cryogenic generation device, for example, a refrigerator using a Stirling refrigeration cycle, the refrigerant is cooled by passing a counterflow of refrigerant such as helium gas through the regenerator material. Such a cold storage material is naturally required to have a large cold storage capacity and high heat conduction properties. Conventionally, ships have been used as such a cold storage material, but lead's specific heat drops more rapidly than helium gas at temperatures below 10K, making it unable to function as a cold storage material. The limit of such refrigerators was that they could only cool down to about 20K. Therefore, there is a need for a substance that has a higher specific heat than helium gas even at extremely low temperatures of 10 K or lower and can function as a cold storage material.
また、超伝導体の新たな冷却方式として、その
線材を高熱容量物質からなる安定化材で被覆し、
低温ガス流で冷却する方法が期待されているが、
前述のように極低温において高い比熱を有する適
当な物質が従来知られておらず、そのような物質
の開発が求められている。 In addition, as a new cooling method for superconductors, the wire is coated with a stabilizing material made of a high heat capacity material.
A method of cooling with a low-temperature gas stream is expected, but
As mentioned above, there has been no known suitable material that has a high specific heat at extremely low temperatures, and there is a demand for the development of such a material.
すなわち、本発明の目的は、従来の磁気冷凍作
業物質が有する動作温度領域が狭い、あるいは冷
凍出力が小さい等の問題点、および20K以下の低
温において蓄冷材として、あるいは超伝導用安定
化材として、有効に機能する物質が知られていな
いという問題点を解決する新規物質を提供するこ
とにある。
That is, the purpose of the present invention is to solve the problems of conventional magnetic refrigeration materials, such as their narrow operating temperature range or low refrigeration output, and to solve the problems of conventional magnetic refrigeration materials, such as their narrow operating temperature range or low refrigeration output, and their use as regenerator materials or stabilizing materials for superconductivity at low temperatures below 20K. The purpose of the present invention is to provide a new substance that solves the problem that no substance that functions effectively is known.
本発明は、前記従来の問題点を解決する新規物
質である、一般式：
Dy3-x+〓Gdx Aly Ga5-y-〓 O12
〔式中、ｘ，ｙおよびδは、次式：
０≦ｘ≦３＋δ、
０≦ｙ≦５−δ、および
０≦δ≦0.6
で表わされる数である。ただし、δ＝０のとき
は、
ｘ＝０かつｙ＝０の場合、
ｘ＝３かつｙ＝０の場合、および
ｘ＝０かつｙ＝５の場合
を除く。
The present invention is a novel substance that solves the above conventional problems, and has the general formula: Dy 3-x+ 〓Gd x Al y Ga 5-y- 〓 O 12 [where x, y and δ are represented by the following formula : 0≦x≦3+δ, 0≦y≦5−δ, and 0≦δ≦0.6. However, when δ=0, the following cases are excluded: x=0 and y=0, x=3 and y=0, and x=0 and y=5.
また、ｘ＝３のときは、 0.01≦δ≦0.3かつ0.04≦ｙ≦５ である場合を除く。 Also, when x=3, 0.01≦δ≦0.3 and 0.04≦y≦5 except when
で表わされる組成を有する磁性体材料を提供する
ものである。The object of the present invention is to provide a magnetic material having a composition represented by:
本発明の磁性体材料は、磁気作業物質としての
観点からは、第１に、DAGにおける冷却温度幅
が広いという特性とGGGにおける大きいエント
ロピー変化が得られるるという特性とを結合した
特性を備えることができ、第２に、前記一般式に
おけるδ＞０である非化学量論的組成の場合に
は、Alおよび／またはGaが占めるべき位置を部
分的に希土類のDyおよび／またはGdが占めるこ
とにより、新たな磁気的相互作用が生じ、より大
きな磁気エントロピー変化が得られるなど優れた
材料たり得る。 From the viewpoint of a magnetic working substance, the magnetic material of the present invention has, firstly, a characteristic that combines the characteristic of wide cooling temperature range in DAG and the characteristic of obtaining a large entropy change in GGG. Second, in the case of a non-stoichiometric composition in which δ>0 in the general formula, rare earth elements Dy and/or Gd partially occupy the positions that should be occupied by Al and/or Ga. As a result, a new magnetic interaction occurs and a larger change in magnetic entropy can be obtained, making it an excellent material.
また、δが０＜δ≦0.6の範囲にあると、材料
の相転位温度TNを約４〜8Kの範囲に調整するこ
とができる結果、約8K以下においても蓄冷材と
して有効である。特に、Gdを成分として含む場
合には、大きな異常比熱が得られるので、蓄冷材
として特に有用である。同様の理由で、かかる本
発明の磁性体材料は、超伝導体の安定化材として
も良好である。 Further, when δ is in the range of 0<δ≦0.6, the phase transition temperature T N of the material can be adjusted to a range of approximately 4 to 8K, and as a result, it is effective as a cold storage material even at temperatures below approximately 8K. In particular, when Gd is included as a component, a large abnormal specific heat can be obtained, making it particularly useful as a cold storage material. For the same reason, the magnetic material of the present invention is also suitable as a stabilizing material for superconductors.
本発明の磁性体材料の形態は、単結晶でも多結
晶でもよい。単結晶としては、公知の方法、例え
ばいわゆるチヨクラルスキー法等により製造する
ことができる。また、多結晶としては、公知の方
法、例えば、シンター（焼結）法等により製造す
ることができる。 The form of the magnetic material of the present invention may be single crystal or polycrystal. A single crystal can be produced by a known method, such as the so-called Czyochralski method. Further, the polycrystalline material can be manufactured by a known method such as a sintering method.
以下、本発明を実施例により具体的に説明す
る。
Hereinafter, the present invention will be specifically explained with reference to Examples.
実施例 １
純度99.99％以上の酸化デイスプロシウム2528
ｇ、純度99.99％以上の酸化ガドリニウム263ｇ及
び純度99.99％以上の酸化アルミニウム1209ｇを
混合した。Example 1 Disprosium oxide 2528 with a purity of 99.99% or more
g, 263 g of gadolinium oxide with a purity of 99.99% or more, and 1209 g of aluminum oxide with a purity of 99.99% or more were mixed.
この混合原料を100〓・100Hのイリジウムルツボ
に充填して、N2ガス雰囲気下で高周波誘導加熱
により、イリジウムルツボを加熱し、1930℃まで
昇温し融解した。融解した原料に種結晶を融着さ
せた後、結晶回転数18rpm、成長速度２mm／hrに
て引上げを行なつた。高周波電力を調整して単結
晶の直径を42mmまで広げ、直胴部の長さが70mmに
なるまで引上げた。 This mixed raw material was filled into a 100〓·100 H iridium crucible, and the iridium crucible was heated by high-frequency induction heating in an N 2 gas atmosphere to raise the temperature to 1930°C and melt it. After a seed crystal was fused to the molten raw material, pulling was performed at a crystal rotation speed of 18 rpm and a growth rate of 2 mm/hr. By adjusting the high-frequency power, the diameter of the single crystal was increased to 42 mm, and the length of the straight body was raised to 70 mm.
得られた単結晶を測定したところ、格子定数が
12.082Åであり、組成はDy2.8Gd0.3Al4.9O12であつ
た。 When the obtained single crystal was measured, the lattice constant was
12.082 Å, and the composition was Dy 2.8 Gd 0.3 Al 4.9 O 12 .
この単結晶を直径30mm、長さ40mmの形状に切
断、研削加工し、磁気冷凍用作業物質に供した。 This single crystal was cut and ground into a shape of 30 mm in diameter and 40 mm in length, and used as a working material for magnetic refrigeration.
実施例 ２
実施例１で使用したのと同一の材料を、それぞ
れ酸化デイスプロシウム1103ｇ、酸化ガドリニウ
ム268ｇ、そして酸化アルミニウム629ｇの量で混
合し、この混合原料を80×80Hのイリジウムルツ
ボに充填して、N2ガス雰囲気下で高周波誘導加
熱によりイリジウムルツボを加熱し、1930℃まで
昇温して融解した。融解した原料に種結晶を融着
させた後、結晶回転数20rpm、成長速度1.5mm／
hrにて引上げを行なつた。高周波電力で調整して
単結晶の直径を36mmまで広げ、直胴部の長さが68
mmになるまで引上げた。Example 2 The same materials used in Example 1 were mixed in amounts of 1103 g of dysprosium oxide, 268 g of gadolinium oxide, and 629 g of aluminum oxide, and the mixed raw materials were filled into an 80 x 80 H iridium crucible. Then, the iridium crucible was heated by high-frequency induction heating in an N 2 gas atmosphere, and the temperature was raised to 1930°C to melt it. After fusing the seed crystal to the molten raw material, the crystal rotation speed is 20 rpm and the growth rate is 1.5 mm/
The withdrawal was carried out at hr. The diameter of the single crystal is expanded to 36 mm by adjusting with high frequency power, and the length of the straight body is 68 mm.
It was raised to mm.
得られた単結晶について測定したところ、格子
定数が12.059Åであり、組成はDy2.4Gd0.6Al5O12
であつた。 When the obtained single crystal was measured, the lattice constant was 12.059 Å, and the composition was Dy 2.4 Gd 0.6 Al 5 O 12
It was hot.
この単結晶を実施例１と同様にして、磁気冷凍
用作業物質に供した。 This single crystal was used as a working material for magnetic refrigeration in the same manner as in Example 1.
実施例 ３
実施例１で使用したのと同一の材料を、それぞ
れ酸化デイスプロシウム1235ｇ、酸化ガドリニウ
ム171ｇ、酸化アルミニウム518ｇの量で用い、さ
らに純度99.99％以上の酸化ガドリニウム75ｇを
使用し、これらを混合した。得られた混合原料を
80〓×80Hのイリジウムルツボに充填して、
N299vol％、O21vol％の混合ガス雰囲気下で、高
周波誘導加熱により、イリジウムルツボを加熱
し、1880℃まで昇温して融解した。融解した原料
から、実施例２と同一条件で単結晶を成長させ、
直胴部の長さが65mmになるまで引き上げた。Example 3 The same materials used in Example 1 were used in amounts of 1235 g of dysprosium oxide, 171 g of gadolinium oxide, and 518 g of aluminum oxide, and 75 g of gadolinium oxide with a purity of 99.99% or higher were used. Mixed. The obtained mixed raw material
Fill an 80〓× 80H iridium crucible,
In a mixed gas atmosphere of 99 vol% N 2 and 1 vol% O 2 , the iridium crucible was heated by high-frequency induction heating, and the temperature was raised to 1880° C. to melt it. A single crystal was grown from the melted raw material under the same conditions as in Example 2,
It was pulled up until the length of the straight body was 65mm.
得られた単結晶について測定したところ、格子
定数が12.142Åであり、組成はDy2.8Gd0.4Al4.3
Ga0.5O12であつた。 When the obtained single crystal was measured, the lattice constant was 12.142 Å, and the composition was Dy 2.8 Gd 0.4 Al 4.3
It was Ga 0.5 O 12 .
この単結晶を実施例１と同様にして、磁気冷凍
用作業物質に供した。 This single crystal was used as a working material for magnetic refrigeration in the same manner as in Example 1.
実施例 ４
原料として、酸化デイスプロシウム229ｇ、酸
化ガドリニウム1157ｇおよび酸化アルミニウム
614ｇを使用した以外は、実施例３と同様にして
混合材料を1930℃まで昇温して融解した。融解し
た原料から実施例２と同一条件て単結晶を成長さ
せ、直胴部の長さが75mmになるまで引き上げた。Example 4 As raw materials, 229 g of dysprosium oxide, 1157 g of gadolinium oxide, and aluminum oxide
The mixed material was heated to 1930° C. and melted in the same manner as in Example 3, except that 614 g was used. A single crystal was grown from the molten raw material under the same conditions as in Example 2, and pulled up to a straight body length of 75 mm.
得られた単結晶について測定したところ、格子
定数が12.137Åであり、組成はDy0.5Gd2.6Al4.9012
であつた。 When the obtained single crystal was measured, the lattice constant was 12.137 Å, and the composition was Dy 0.5 Gd 2.6 Al 4.9 0 12
It was hot.
この単結晶を実施例１と同様にして、磁気冷凍
用作業物質に供した。 This single crystal was used as a working material for magnetic refrigeration in the same manner as in Example 1.
実施例 ５
原料として、上述の実施例で使用したもののう
ち、酸化デイスプロシウム1364ｇ、酸化アルミニ
ウム559ｇおよび酸化ガリウム77ｇを使用した以
外は、実施例３と同様にして混合材料を1900℃ま
で昇温して融解した。融解した原料から実施例２
と同一条件で単結晶を成長させ、直胴部の長さが
75mmになるまで引上げた。Example 5 The mixed material was heated to 1900°C in the same manner as in Example 3, except that 1364 g of dysprosium oxide, 559 g of aluminum oxide, and 77 g of gallium oxide were used as raw materials among those used in the above example. and melted. Example 2 from melted raw materials
A single crystal was grown under the same conditions as , and the length of the straight body was
I raised it to 75mm.
得られた単結晶について測定したところ、格子
定数が12.073Åであり、組成はDy3Al4.5Ga0.5O12
であつた。 When the obtained single crystal was measured, the lattice constant was 12.073 Å, and the composition was Dy 3 Al 4.5 Ga 0.5 O 12
It was hot.
この単結晶を実施例１と同様にして、磁気冷凍
用作業物質に供した。 This single crystal was used as a working material for magnetic refrigeration in the same manner as in Example 1.
実施例 ６
原料として、上述の実施例で使用したもののう
ち、酸化ガドリニウム1362ｇと酸化アルミニウム
638ｇを使用し、融解温度を1930℃とした以外は、
実施例５とまつたく同様にして単結晶を引上げ
た。Example 6 Among the raw materials used in the above examples, 1362 g of gadolinium oxide and aluminum oxide were used as raw materials.
Except that 638g was used and the melting temperature was 1930℃.
A single crystal was pulled in the same manner as in Example 5.
得られた単結晶を測定したところ、格子定数が
12.116Åであり、組成はGd3Al5O12であつた。 When the obtained single crystal was measured, the lattice constant was found to be
12.116 Å, and the composition was Gd 3 Al 5 O 12 .
この単結晶を実施例１と同様にして、磁気冷凍
用作業物質に供した。 This single crystal was used as a working material for magnetic refrigeration in the same manner as in Example 1.
実施例 ７
原料として、上述の酸化デイスプロシウム1171
ｇ、酸化ガドリニウム163ｇ、酸化アルミニウム
57ｇおよび酸化ガリウム609ｇを使用した以外は
実施例３と同様にして混合原料を1900℃まで昇温
して溶解した。融解した材料から実施例２と同様
の条件で直胴部の長さが65mmになるまで単結晶を
引上げた。Example 7 The above-mentioned disprosium oxide 1171 was used as a raw material.
g, gadolinium oxide 163g, aluminum oxide
The mixed raw material was heated to 1900° C. and dissolved in the same manner as in Example 3 except that 57 g and 609 g of gallium oxide were used. A single crystal was pulled from the molten material under the same conditions as in Example 2 until the length of the straight body part was 65 mm.
得られた単結晶について測定したところ、格子
定数が12.396Åであり、組成はDy2.8Gd0.4Al0.5
Ga4.3O12であつた。 When the obtained single crystal was measured, the lattice constant was 12.396 Å, and the composition was Dy 2.8 Gd 0.4 Al 0.5
It was Ga 4.3 O 12 .
この単結晶を実施例１と同様にして、磁気冷凍
用作業物質に供した。 This single crystal was used as a working material for magnetic refrigeration in the same manner as in Example 1.
実施例 ８
上述した酸化デイスプロシウム1087ｇ、酸化ガ
ドリニウム263ｇ、酸化アルミニウム495ｇおよび
酸化ガリウム154ｇを混合し、加圧成形したもの
を25×10×10cmのアルミナ容器に入れ空気雰囲気
において、1350℃で10時間加熱、焼成し、多結晶
体を得た。Example 8 1087g of the above-mentioned dysprosium oxide, 263g of gadolinium oxide, 495g of aluminum oxide and 154g of gallium oxide were mixed and pressure-molded.The product was placed in a 25 x 10 x 10 cm alumina container and heated at 1350°C for 10 minutes in an air atmosphere. A polycrystal was obtained by heating and firing for a period of time.
得られた多結晶体を測定したところ、格子定数
が12.114Åであり、組成はDy2.4Gd0.6Al4.0Ga1.0012
であつた。 When the obtained polycrystal was measured, the lattice constant was 12.114 Å, and the composition was Dy 2.4 Gd 0.6 Al 4.0 Ga 1.0 0 12
It was hot.
この多結晶体を磁気冷凍作業物質に供した。 This polycrystalline body was subjected to magnetic refrigeration working material.
本発明の磁性体材料は、23〜1.8Kの広い温度
領域において磁気冷凍用作業物質として優れた磁
気熱量効果を示す。特に15K以上を含む上記全領
域において外部磁場に対するエントロピー変化が
十分に大きい点で、従来のGGG単結晶および
DAG単結晶に比し優れたものである。
The magnetic material of the present invention exhibits an excellent magnetocaloric effect as a working material for magnetic refrigeration in a wide temperature range of 23 to 1.8K. In particular, the entropy change with respect to the external magnetic field is sufficiently large in the above range including 15K or higher, compared to the conventional GGG single crystal.
It is superior to DAG single crystal.
また、本発明の磁性体材料は磁場中に設置した
状態において、約8K以下の極低温においてもヘ
リウムガスに比しかなり高い比熱を有するもので
あり、従来の鉛では不可能であつた20K以下の極
低温領域においても優れた蓄冷材として機能する
ことができる。さらにまた、超伝導体を被覆する
安定化材としても優れている。 Furthermore, when the magnetic material of the present invention is placed in a magnetic field, it has a considerably higher specific heat than helium gas even at extremely low temperatures of approximately 8K or less, and has a specific heat of 20K or less, which was impossible with conventional lead. It can function as an excellent cold storage material even at extremely low temperatures. Furthermore, it is also excellent as a stabilizing material for coating superconductors.
Claims (1)
は、 ｘ＝０かつｙ＝０の場合、 ｘ＝３かつｙ＝０の場合、および ｘ＝０かつｙ＝５の場合 を除く。 また、ｘ＝３のときは、 0.01≦δ≦0.3かつ0.04≦ｙ≦５ である場合を除く。〕 で表わされる組成を有する磁性体材料。[Claims] 1 General formula Dy 3-x+ 〓Gd x Al y Ga 5-y- 〓 O 12 [In the formula, x, y and δ are as follows: 0≦x≦3+δ, 0≦y≦ 5-δ, and 0≦δ≦0.6. However, when δ=0, the following cases are excluded: x=0 and y=0, x=3 and y=0, and x=0 and y=5. Furthermore, when x=3, the following cases are excluded: 0.01≦δ≦0.3 and 0.04≦y≦5. ] A magnetic material having a composition represented by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60266865A JPS62128921A (en) | 1985-11-26 | 1985-11-26 | magnetic material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60266865A JPS62128921A (en) | 1985-11-26 | 1985-11-26 | magnetic material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62128921A JPS62128921A (en) | 1987-06-11 |
| JPH0313171B2 true JPH0313171B2 (en) | 1991-02-21 |
Family
ID=17436727
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60266865A Granted JPS62128921A (en) | 1985-11-26 | 1985-11-26 | magnetic material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62128921A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5010071B2 (en) * | 2000-07-18 | 2012-08-29 | 株式会社東芝 | Cold storage material, manufacturing method thereof, and refrigerator using the cold storage material |
| US6467277B2 (en) * | 2000-07-18 | 2002-10-22 | Kabushiki Kaisha Toshiba | Cold accumulating material, method of manufacturing the same and refrigerator using the material |
| CN104531085A (en) * | 2015-01-14 | 2015-04-22 | 厦门大学 | Application of gadolinium hydroxide |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61111996A (en) * | 1984-11-07 | 1986-05-30 | Natl Res Inst For Metals | Rare earth garnet single crystal and method for producing the same |
-
1985
- 1985-11-26 JP JP60266865A patent/JPS62128921A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62128921A (en) | 1987-06-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2002293693A (en) | Terbium-aluminum-garnet single crystal and method of manufacturing for the same | |
| JPS6230840A (en) | Magnetic refrigeration working material and its manufacturing method | |
| CN103031501B (en) | Erbium base amorphous composite magnetic cold-storage material and preparation method thereof, Cryo Refrigerator | |
| KR0142859B1 (en) | Amorphous Refrigerant | |
| JPH0313171B2 (en) | ||
| JP2001226196A (en) | Terbium aluminum garnet single crystal and method for producing the same | |
| CN119287511A (en) | A low thermal conductivity polycrystalline Cs2ZnI4 material, a single crystal Cs2ZnI4 material and its application | |
| Menovsky et al. | Crystal growth and characterization of MT2Si2 ternary intermetallics (M= U, RE and T= 3d, 4d, 5d transition metals) | |
| Kimura et al. | Single crystals of RAlO3 (R: Dy, Ho and Er) for use in magnetic refrigeration between 4.2 and 20 K | |
| JPH034518B2 (en) | ||
| CN102864356A (en) | Rare earth-nickel material and preparation method and application thereof | |
| CN120126885B (en) | Magnetic refrigeration alloy material and preparation method and application thereof | |
| Kacharava et al. | YBa2Cu3O7-y single-crystal growth by the method of horizontally directed temperature gradient | |
| EP0949357B1 (en) | Method for preparing oxide single crystalline materials | |
| JPS6335703B2 (en) | ||
| JPS6316335B2 (en) | ||
| JP3548660B2 (en) | Superconductors, precursors thereof, methods for producing them, and uses of superconductors | |
| Fahey et al. | Vertical gradient-freeze growth of aluminate crystals | |
| JPH10101490A (en) | Manufacturing method of oxide superconductor | |
| JP2801811B2 (en) | Manufacturing method of oxide superconductor having large magnetic levitation force | |
| CN118621238A (en) | A high magnetocaloric effect Cu-containing high entropy rare earth-based amorphous alloy and preparation method thereof | |
| JP3115695B2 (en) | Manufacturing method of oxide superconductor having large magnetic levitation force | |
| CN117210941A (en) | MgMn 6 Sn 6 Method for producing single crystals and use thereof in magnetic refrigeration materials | |
| JPS60103273A (en) | Magnetic refrigerator | |
| CN112342475A (en) | Microalloyed heavy rare earth based amorphous alloy and preparation method and application thereof |