Effects of dynamic stress in magnetic superlattice of a monoaxial chiral magnet Cr1/3NbS2

Effects of dynamic stress in magnetic superlattice of a monoaxial chiral magnet Cr1/3NbS2
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单轴手性磁体 Cr1/3NbS2 磁超晶格中动态应力的影响

DOI:
10.1088/1742-6596/969/1/012132
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发表时间:
2018
期刊:
Journal of Physics: Conference Series
影响因子:
--
通讯作者:
K. Inoue
K. Inoue
中科院分区:
--
文献类型:
--
作者:
K. Tsuruta;M. Mito;Y. Togawa;Y. Kousaka;J. Akimitsu;K. Inoue

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单轴手征磁体在垂直于螺旋手征轴的磁场作用下形成一种自旋超晶格结构,称为手征孤子晶格(CSL)。据报道,CSL伴随着磁阻效应以及磁化和磁阻的离散变化。为了验证结构修饰对CSL态的影响,我们测量了在频率为MHz量级的动态应力(DS)下的磁阻,该动态应力由压电陶瓷振荡器施加。在降低H值的同时,稳定地施加DS会抑制手征孤子的插入。另一方面,当H减小时,脉冲状DS的应用有助于手征孤子的插入。这些结果表明,DS改变了单轴手征磁体的自旋结构,因此,我们可以改变手征孤子的插入激活能,而H减小。
A monoaxial chiral magnet forms a kind of spin superlattice structure, termed chiral soliton lattice (CSL), by the application of a magnetic field H perpendicular to a helical chiral axis. It has been reported that the CSL accompanies the magnetoresistance effect as well as a discrete change in magnetization and magnetoresistance. In order to verify the effect of the structural modification on the CSL state, we measured the magnetoresistance under the dynamic stress (DS) with a frequency of the order of MHz, which was applied by a piezoelectric ceramic oscillator. The steady application of DS while decreasing H resulted in a suppression of the insertion of chiral soliton. On the other hand, the application of a pulse-like DS while H decreased assisted the insertion of chiral soliton. These results demonstrate that DS modifies the spin structure of the monoaxial chiral magnet, and we can therefore change the activation energy for the insertion of chiral soliton while H is decreased.
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