Temperature dependence of the picosecond spin Seebeck effect
Temperature dependence of the picosecond spin Seebeck effect
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DOI：
10.1063/5.0050205
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发表时间：
2021-07-19
影响因子：
4
通讯作者：
Ciccarelli, Chiara
中科院分区：
文献类型：
--
作者：
Kholid, Farhan Nur;Hamara, Dominik;Ciccarelli, Chiara
我们在外部外加磁场的作用下，对Y3Fe5O12 (YIG)|Pt从5k到室温进行了温度相关的光泵浦太赫兹发射测量。我们研究了自旋塞贝克效应的温度依赖性，并观察到随着温度的降低，自旋塞贝克效应持续增加，这与在电测量中观察到的相反，当0 K接近时，自旋塞贝克效应被抑制。通过定量分析不同的贡献，我们分离了自旋混合电导的温度依赖性，并观察了与YIG中磁振子谱带相关的特征。
We performed temperature-dependent optical pump-THz emission measurements in Y3Fe5O12 (YIG)|Pt from 5 K to room temperature in the presence of an externally applied magnetic field. We study the temperature dependence of the spin Seebeck effect and observe a continuous increase as temperature is decreased, opposite to what is observed in electrical measurements, where the spin Seebeck effect is suppressed as 0 K is approached. By quantitatively analyzing the different contributions, we isolate the temperature dependence of the spin-mixing conductance and observe features that are correlated with the bands of magnon spectrum in YIG.