-
通过结构和磁性测量，研究了四元哈斯勒合金Ni50-xCoxMn38Sn12（x=1, 2, 4, 6, 8）的晶体结构和相变特征.结果表明，Co原子的掺杂不但没有影响三元哈斯勒合金Ni-Mn-Sn的原有结构，而且还增强了样品在奥氏体相的铁磁交换作用.此外，通过Maxwell方程计算了其中三种成分样品（x= 2, 4, 6）的磁熵变ΔSM
-
关键词:
- 哈斯勒合金 /
- Ni-Co-Mn-Sn /
- 马氏体相变 /
- 磁热效应
The crystal structure and phase transition in Ni50-xCoxMn38Sn12（x=1, 2, 4, 6, 8） Heusle alloys were investigated by means of structure analysis and magnetism measurements. The results show that the doping of the Co atom affects neither the original structure of Ni-Mn-Sn Heusler alloys, nor the ferromagnetic interaction strengthens in the austenitic state. Furthermore, based on Maxwell equation, the magnetic entropy change （ΔSM） of three samples （x=2, 4, 6） has been calculated. A large magnetic entropy change of 37.09 J/kg K at about 320 K for a magnetic field change of 50 kOe is obtained in Ni48Co2Mn38Sn12 alloy.-
Keywords:
- Heusler alloys /
- Ni-Co-Mn-Sn /
- martensitic transformation /
- magnetocaloric effect
计量
- 文章访问数: 8234
- PDF下载量: 1522
- 被引次数: 0
物理学报. 2009, 58(11): 7857-7863.
doi: 10.7498/aps.58.7857.
哈斯勒合金Ni-Co-Mn-Sn的马氏体相变及其磁热效应研究
- 收稿日期: 2009-01-10
- 修回日期: 2009-03-14
- 刊出日期: 2009-11-20
摘要: 通过结构和磁性测量，研究了四元哈斯勒合金Ni50-xCoxMn38Sn12（x=1, 2, 4, 6, 8）的晶体结构和相变特征.结果表明，Co原子的掺杂不但没有影响三元哈斯勒合金Ni-Mn-Sn的原有结构，而且还增强了样品在奥氏体相的铁磁交换作用.此外，通过Maxwell方程计算了其中三种成分样品（x= 2, 4, 6）的磁熵变ΔSM
-
关键词:
- 哈斯勒合金 /
- Ni-Co-Mn-Sn /
- 马氏体相变 /
- 磁热效应
English Abstract
Martensitic transformation and magnetocaloric effect in Ni-Co-Mn-Sn Heusler alloy
- Received Date:
10 January 2009
- Accepted Date:
14 March 2009
- Published Online:
20 November 2009
Abstract: The crystal structure and phase transition in Ni50-xCoxMn38Sn12（x=1, 2, 4, 6, 8） Heusle alloys were investigated by means of structure analysis and magnetism measurements. The results show that the doping of the Co atom affects neither the original structure of Ni-Mn-Sn Heusler alloys, nor the ferromagnetic interaction strengthens in the austenitic state. Furthermore, based on Maxwell equation, the magnetic entropy change （ΔSM） of three samples （x=2, 4, 6） has been calculated. A large magnetic entropy change of 37.09 J/kg K at about 320 K for a magnetic field change of 50 kOe is obtained in Ni48Co2Mn38Sn12 alloy.
下载:
