Time-resolved study of field-induced suppression of longitudinal spin Seebeck effect
Time-resolved study of field-induced suppression of longitudinal spin Seebeck effect
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DOI：
10.7567/apex.10.073002
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发表时间：
2017-06
影响因子：
2.3
通讯作者：
T. Hioki;R. Iguchi;Z. Qiu;D. Hou;K. Uchida;E. Saitoh
中科院分区：
文献类型：
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作者：
T. Hioki;R. Iguchi;Z. Qiu;D. Hou;K. Uchida;E. Saitoh
我们在室温下用时间分辨测量技术研究了磁场对纵向自旋Seebeck效应(LSSE)的抑制。结果显示了两个不同的时间域：短时间域，其中观测电压对磁场不敏感；长时间域，磁场同时降低了响应时间和观测电压的大小。我们通过对暂态LSSE响应的拟合来估计磁振子的传播长度。传播长度与外加磁场有很强的相关性，说明了长程和低频磁子在LSSE中的重要性。
We have investigated the magnetic-field-induced suppression of the longitudinal spin Seebeck effect (LSSE) by using a time-resolved measurement technique at room temperature. The result manifested two distinctive time domains: the short-time domain where the observed voltage is insensitive to the magnetic fields, and the long-time domain where the both response time and the magnitude of the observed voltage decreased simultaneously by the magnetic fields. We estimated the magnon propagation length by fitting the transient LSSE response. The propagation length shows a strong dependence on the applied magnetic field, indicating the importance of long-range and low-frequency magnons in the LSSE.