The bimodal distribution spin Seebeck effect enhancement in epitaxial Ni0.65Zn0.35Al0.8Fe1.2O4 thin film

The bimodal distribution spin Seebeck effect enhancement in epitaxial Ni0.65Zn0.35Al0.8Fe1.2O4 thin film
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外延Ni0.65Zn0.35Al0.8Fe1.2O4薄膜双峰分布自旋塞贝克效应增强

DOI:
10.1063/1.5022195
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发表时间:
2018-04
影响因子:
4
通讯作者:
Saitoh Eiji
Saitoh Eiji
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Wang Hua;Hou Dazhi;Kikkawa Takashi;Ramos Rafael;Shen Ka;Qiu Zhiyong;Chen Yao;Umeda Maki;Shiomi Yuki;Jin Xiaofeng;Saitoh Eiji

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系统地研究了外延Ni0.65Zn0.35Al0.8Fe1.2O4(NZA铁氧体)薄膜中自旋塞贝克效应(SSE)的温度依赖性。高场下的 SSE 显示出从 3 K 到 300 K 的双峰分布增强,并且与双峰洛伦兹函数很好地拟合。我们推测 Pt/NZA 铁氧体双层中的对称 SSE 增强,这与磁振子极化子在 Pt/YIG [T.吉卡瓦等人。物理。莱特牧师。 117, 207203 (2016)],可能是由在量化的磁振子和声子色散的交点处发生的磁振子-声子相互作用产生的。 SSE结果有助于研究磁性超薄膜中的磁子-声子相互作用。
The temperature dependence of the spin Seebeck effect (SSE) in epitaxial Ni0.65Zn0.35Al0.8Fe1.2O4 (NZA ferrite) thin film has been investigated systematically. The SSE at high fields shows a bimodal distribution enhancement from 3 K to 300 K and is well fitted with a double-peak Lorentzian function. We speculate the symmetric SSE enhancement in Pt/NZA ferrite bilayer, which is different from the magnon polarons induced asymmetric spikes in the SSE of Pt/YIG [T. Kikkawa et al. Phys. Rev. Lett. 117, 207203 (2016)], may result from the magnon-phonon interactions occurring at the intersections of the quantized magnon and phonon dispersions. The SSE results are helpful for the investigation of the magnon-phonon interaction in the magnetic ultrathin films.
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