周广宏
,
潘旋
,
朱雨富
,
王寅岗
稀有金属材料与工程
研究了磁场冷却前后Ni5oMn37In13磁驱动形状记忆合金薄膜在低温下的磁学行为.结果表明:磁场冷却后的Ni50Mn37In13薄膜在10K温度下表现出一定的交换偏置效应.在特征温度Tf以下,零场冷却状态下的Ni50Mn37In13合金处于超自旋玻璃态,而经磁场冷却后发生了从自旋玻璃态向磁有序的超铁磁结构的变化.超铁磁结构中的超铁磁团簇与反铁磁基体构成了铁磁/反铁磁耦合,从而导致了交换偏置的产生.
关键词:
交换偏置
,
磁驱动形状记忆合金
,
薄膜
Y.F. Wang
,
J.M. Wang
,
C.B. Jiang
,
H.B. Xu*
金属学报(英文版)
A statistical work has been done to collect the composition ranges of Ni-Mn-Ga alloys exhibiting different structures and martensite start temperature (Ms), large magnetostrain or the co-existence of magnetic and structural transitions. The alloys with five-layered (5M), seven-layered (7M) modulated and non-modulated (T) martensitic structures were mapped in the graph. An empirical formula has been presented to reflect the effect of elements nickel (Ni), manganese (Mn) and gallium (Ga), on the martensite start temperature (Ms). The martensitic structure is sensitive to the composition and the martensitic transformation temperature is most drastically affected by the Ni content. The alloys with large magnetostrain or co-existence effect of the magnetic and structural transitions were also listed in a limited area.
关键词:
Ni2MnGa alloy
,
null
,
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