Magnon-phonon interactions in the spinel compound MnSc2Se4,Physical Review B

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Magnon-phonon interactions in the spinel compound MnSc2Se4
Physical Review B ( IF 3.2 ) Pub Date : 2024-09-09 , DOI: 10.1103/physrevb.110.094414
J. Sourd ₁ , Y. Skourski ₁ , L. Prodan _{2,

3} , V. Tsurkan _{2,

3} , A. Miyata ₄ , J. Wosnitza _{1,

5} , S. Zherlitsyn ₁

Affiliation

We investigated the magnetic and magnetoelastic properties of

{MnSc}_{2} {Se}_{4}

single crystals at low temperature under a magnetic field directed along the crystallographic [111] axis. The magnetization data at low temperature show a linear increase with magnetic field, until saturation is reached above 15 T. In ultrasound, a longitudinal acoustic mode shows a softening in field, which is absent for a transverse acoustic mode. We discuss these results using a microscopic model based on the framework of linear spin-wave theory. The magnetic and magnetoelastic data are qualitatively reproduced by considering magnon-phonon interactions arising from exchange-striction coupling between the crystal lattice and spin-wave fluctuations in the zero-temperature limit.

中文翻译：

尖晶石化合物 MnSc2Se4 中的磁子-声子相互作用

我们研究了磁和磁弹性特性

{MnSc}_{2} {Se}_{4}

低温下沿晶体[111]轴定向的磁场下的单晶。低温下的磁化数据显示随磁场线性增加，直到达到 15 T 以上的饱和。在超声波中，纵向声模显示出场软化，而横向声模则不存在这种情况。我们使用基于线性自旋波理论框架的微观模型讨论这些结果。通过考虑晶格之间的交换严格耦合和零温度极限下的自旋波涨落所产生的磁振子-声子相互作用，定性地再现了磁和磁弹性数据。

更新日期：2024-09-09

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