Magnetic Bragg peak enhancement under ultrasound injection
Magnetic Bragg peak enhancement under ultrasound injection
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超声注射下的磁布拉格峰增强
DOI：
10.1103/physrevresearch.4.013245
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发表时间：
2022
影响因子：
4.2
通讯作者：
Ieda Jun'ichi
中科院分区：
文献类型：
--
作者：
Shamoto Shin-ichi;Akatsu Mitsuhiro;Matsuura Masato;Ohira-Kawamura Seiko;Harii Kazuya;Ono Masao;Chang Lieh-Jeng;Ito Takashi U.;Nemoto Yuichi;Ieda Jun'ichi
用准弹性中子散射方法研究了超声注入对钇铁石榴石磁布拉格峰的影响。随着温度的降低，磁布拉格峰大大增强。能量宽度与由超声注入引起的样品温度增加的平方根成比例地增加。基于液体模型，当磁畴壁在磁场下被去除时，估计的有效质量变得轻。由于磁布拉格峰被晶格振动增强，这种增强与自旋-晶格耦合密切相关。在100 K以上观察到的纵向模式的急剧下降，表明自旋-晶格耦合的退化。这是一致的自旋塞贝克效应的抑制时，温度上升到100 K以上，证明自旋-晶格耦合的退化机制。
Ultrasound injection effect on a magnetic Bragg peak of yttrium iron garnet has been studied by quasielastic neutron scattering. The magnetic Bragg peak is vastly enhanced with decreasing temperature. The energy width increases proportionally to the square root of the sample temperature increase induced by the ultrasound injection. Based on a liquid model, the estimated effective mass becomes light when magnetic domain walls are removed under a magnetic field. Because the magnetic Bragg peak is enhanced by the lattice vibration, the enhancement is expected to closely relate to the spin-lattice coupling. The sharp drop is observed above 100 K for the longitudinal mode, indicating the degradation of the spin-lattice coupling. It is consistent with the suppression of the spin Seebeck effect when the temperature rises above 100 K, demonstrating the spin-lattice coupling as the degradation mechanism.
影响因子：
64.8
作者：
Uchida, K.;Takahashi, S.;Saitoh, E.
通讯作者：
Saitoh, E.