Magnetic-field effects on Jahn-Teller distortion in ferroelastic magnetic insulator Fe1−xMnxCr2O4
Magnetic-field effects on Jahn-Teller distortion in ferroelastic magnetic insulator Fe1−xMnxCr2O4
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DOI：
10.1063/1.3631751
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发表时间：
2011-08
影响因子：
4
通讯作者：
H. Sagayama;S. Ohtani;M. Saito;N. Abe;K. Taniguchi;T. Arima
中科院分区：
文献类型：
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作者：
H. Sagayama;S. Ohtani;M. Saito;N. Abe;K. Taniguchi;T. Arima
用X射线衍射法研究了x=0和0.7时Fe1−xMnxCr2O4晶体中与e轨道有关的Jahn-Teller失真的磁场响应。当在FeCr2O4的正交相中沿[001]c轴施加磁场时，发生了连续的结构磁畴重排。磁畴重排引起了显著的磁致伸缩，这是用应变计观察到的。Fe0.3Mn0.7Cr2O4在结构转变温度Ts1的正上方也出现了可逆磁致伸缩，其中Ts1通过Fe替代达到了铁磁转变温度Tn1。
The magnetic field response of Jahn-Teller distortion associated with the e orbital was investigated by x-ray diffraction in Fe1−xMnxCr2O4 for x = 0 and 0.7. Successive structural domain rearrangements occurred when a magnetic field was applied along the [001]c axis in the orthorhombic phase of FeCr2O4. The domain rearrangements caused significant magnetostriction, which was observed by using a strain gauge. Reversible magnetostriction also appeared just above the structural transition temperature TS1 in Fe0.3Mn0.7Cr2O4, in which TS1 meets the ferrimagnetic transition temperature TN1 by Fe substitution.