Kinetic arrest of martensitic transformation in the NiCoMnIn metamagnetic shape memory alloy
Kinetic arrest of martensitic transformation in the NiCoMnIn metamagnetic shape memory alloy
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DOI：
10.1063/1.2833699
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发表时间：
2008-01-14
影响因子：
4
通讯作者：
Kanomata, Takeshi
中科院分区：
文献类型：
--
作者：
Ito, Wataru;Ito, Kouhei;Kanomata, Takeshi
研究了NiCoMnIn合金在强磁场中马氏体相变引起的磁电阻率变化。在现场冷却过程中，相变在约150K时中断，不会继续进一步冷却。所得到的两相条件在低温下冻结，零场加热释放该条件，从而引起“正向”转变。这些反常现象可以用相变熵变的反常行为和低温下检测到的相界面极低的迁移率来解释。(C)2008年美国物理研究所。
Magnetic and electrical resistivity changes due to a martensitic transformation in large magnetic fields were investigated in a NiCoMnIn alloy. The transformation is interrupted at about 150 K during field cooling and does not proceed with further cooling. The obtained two-phase condition is frozen at low temperatures and zero field heating releases this condition, inducing a "forward" transformation. These unusual phenomena can be explained by an abnormal behavior in the transformation entropy change and an extremely low mobility of the phase interfaces detected at low temperatures. (c) 2008 American Institute of Physics.