Evidence of Magnon Thermal Transport in a Ferromagnetic Glassy Metal

Evidence of Magnon Thermal Transport in a Ferromagnetic Glassy Metal
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铁磁玻璃金属中磁振子热传输的证据

DOI：
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发表时间：
1988
期刊：
影响因子：
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通讯作者：
E. Wassermann
E. Wassermann
中科院分区：
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文献类型：
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作者：
H. Gronert;D. Herlach;E. Wassermann

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研究了非晶态(Fe1-xNix)77Si10B13合金在低温强磁场下的热导率。随着Ni浓度的变化，样品的磁性状态发生了系统的变化。在自旋玻璃区(x=0.9)，观察到磁性二能级系统的声子散射。对强铁磁性合金(x=0)的测量证明了能量通过长程非定域磁子输运。这种自旋波的热导率受到磁振子电子散射的限制。
The thermal conductivity is studied at low temperatures and high magnetic fields on amorphous (Fe1-xNix)77Si10B13 alloys. The magnetic state of the samples is systematically altered by a change of the Ni concentration. In the spin glass regime (x = 0.9) phonon scattering from magnetic two-level systems is observed. The measurements on the strongly ferromagnetic alloy (x = 0) give evidence of energy transport via long-range nonlocalized magnons. This spin wave heat conductivity is limited by magnon-electron scattering.