Magnetostructural transformation and magnetocaloric effect in melt-spun and annealed Mn1−xCuxCoGe ribbons
Magnetostructural transformation and magnetocaloric effect in melt-spun and annealed Mn1−xCuxCoGe ribbons
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DOI：
10.1016/j.jallcom.2014.04.204
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发表时间：
2014-10
影响因子：
6.2
通讯作者：
S. Ma;D. Hou;C. Shih;Junya Wang;Y. Lee;W. Chang;Z. Zhong
中科院分区：
文献类型：
--
作者：
S. Ma;D. Hou;C. Shih;Junya Wang;Y. Lee;W. Chang;Z. Zhong
制备了快淬和退火的Mn 1 −xCuxCoGe薄带。通过磁性、量热和结构测量研究了这些带的磁性和磁热性质。与快淬薄带相比，退火后的Mn1−xCuxCoGe（x= 0.02，0.04）薄带中实现了铁磁TiNiSi型和顺磁Ni2In型之间的耦合磁结构转变。相应地，观察到从快淬带到退火带的磁熵变峰值的大的增强。讨论了退火薄带中一级磁结构转变的起源。
The melt-spun and annealed Mn1−xCuxCoGe ribbons are prepared. The magnetic and magnetocaloric properties of these ribbons was investigated by magnetic, calorimetric and structural measurements. In contrast with the melt-spun ribbons, a coupled magnetostructural transformation between the ferromagnetic TiNiSi-type and paramagnetic Ni2In-type state is achieved in the annealed Mn1−xCuxCoGe (x= 0.02, 0.04) ribbons. Accordingly, the large enhancement of magnetic entropy change peak values from the melt-spun to annealed ribbons is observed. The origins of the first-order magnetostructural transformation in annealed ribbons are discussed.