Magnon-phonon hybridization in nearly compensated magnets for thermoelecric conversion and heat control

本项目研究了磁性绝缘体中的自旋-晶格相互作用效应，特别是磁补偿对Ga-YIG自旋-热转换(自旋-塞贝克效应：SSE)的影响，随着Ga-取代量的增加，磁补偿增加。优化了液相外延生长高质量的Ga-YIG，用X射线衍射仪证实了其结构质量。在比YIG更低的磁场下，SSE电压峰值的存在证实了薄膜具有更大的补偿量和更高的磁质量。进一步的自旋输运研究将被用来研究磁补偿对磁振子-声子杂化的作用及其对自旋-热转换特性的影响。

The project deals with the investigation of spin-lattice interaction effects in magnetic insulators, in particular the effect of magnetic compensation on spin-heat conversion (spin Seebeck effect: SSE) in Ga-substituted yttrium iron garnet (Ga-YIG), with increasing Ga-substitution the magnetic compensation increases.I optimized the growth of high-quality Ga-YIG by liquid phase epitaxy, the structural quality was confirmed by x-ray diffraction. The presence of peaks in the SSE voltage at lower magnetic field than in YIG confirm the larger compensation and high magnetic quality of the films.Further spin transport studies on the grown films are to be performed to investigate the role of magnetic compensation on magnon-phonon hybridization and its effect on the spin-heat conversion properties.