Lattice distortion tuning of the metamagnetic phase transition in tetragonal Cu2Sb-type Mn1.95V0.05Sb alloy

Lattice distortion tuning of the metamagnetic phase transition in tetragonal Cu2Sb-type Mn1.95V0.05Sb alloy
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四方Cu2Sb型Mn1.95V0.05Sb合金变磁相变的晶格畸变调节

DOI:
10.1016/j.scriptamat.2017.09.007
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发表时间:
2018-01
期刊:
影响因子:
6
通讯作者:
Wang Qiang
Wang Qiang
中科院分区:
材料科学1区
文献类型:
--
作者:
Cui Weibin;Ren Wei-Jun;Zhang Zhidong D.;Zhou Xiaoqian;Zhong Hui;Wang Qiang

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Li间隙掺杂和静水压均能使四元Cu 2Sb型Mn 1.95V 0.05Sb合金发生晶格畸变。减压或增加间隙锂含量均使变磁转变温度降低,热滞变宽。研究了它对磁熵变和临界场的影响。适度的静水压有利于提高四元Cu 2Sb型Mn1.95V0.05Sb合金的最大屈服强度。我们的实验表明,MnII-Mn II位之间的原子间距离和周围的电子密度Mn II位是关键的变磁相变。
The lattice distortion of tetragonal Cu2Sb-type Mn1.95V0.05Sb alloy was realized by Li interstitial doping or hydrostatic pressure. The metamagnetic transition temperature was decreased and the thermal hysteresis was widened by either depressurization or increasing interstitial Li content. Its effects on magnetic entropy changes (∆ S) and critical field had been studied. Thanks to moderate hydrostatic pressure, the beneficial enhancement of maximum of∆ Swas achieved in tetragonal Cu2Sb-type Mn1.95V0.05Sb alloy. Our experiment demonstrates that the interatomic distance between MnII-MnIIsites and the electronic density surrounding MnIIsites are critical for metamagnetic phase transition.
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