Magnetic properties of Ni 50 Mn 34.8 In 15.2 probed by Mössbauer spectroscopy
Magnetic properties of Ni 50 Mn 34.8 In 15.2 probed by Mössbauer spectroscopy
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DOI：
10.1103/physrevb.80.144409
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发表时间：
2009-10
影响因子：
3.7
通讯作者：
V. Khovaylo;T. Kanomata;T. Tanaka;M. Nakashima;Y. Amako;R. Kainuma;R. Umetsu;H. Morito;H. Miki-H
中科院分区：
文献类型：
--
作者：
V. Khovaylo;T. Kanomata;T. Tanaka;M. Nakashima;Y. Amako;R. Kainuma;R. Umetsu;H. Morito;H. Miki-H
用X射线衍射、穆斯堡尔谱和超导量子干涉仪等方法研究了Mn位掺杂铁磁形状记忆合金的结构和磁性。实验结果揭示了从高温铁磁奥氏体到低温顺磁马氏体的独特的磁结构转变。在进一步的冷却过程中形成了复杂的磁有序结构，可以归类为团簇玻璃态。观察到的异常的磁结构转变被认为是源于交换相互作用的减弱，由于Mn-Mn原子间距离的突变发生在马氏体相变。
Structural and magnetic properties of aferromagnetic shape memory alloy doped byat the Mn sites have been studied by x-ray diffraction, Mössbauer spectroscopy and superconducting quantum interference device magnetometry. Obtained experimental results have disclosed unique magnetostructural transition from ahigh-temperature ferromagnetic austenitic phaseto alow-temperature paramagnetic martensitic phaseat. Complex magnetic ordering which can be classified as a cluster glass state is formed inon further cooling below. The abnormal magnetostructural transition observed inis suggested to originate from the weakening of exchange interactions due to an abrupt change in Mn-Mn interatomic distances occurring upon the martensitic transformation.