Spin Pumping Induced Inverse Spin-Hall Effects in La0.7Sr0.3MnO3/Platinum Bilayer Film

被引：8

作者：

Luo, G. Y. ^{[1
,2
]}

Song, M. Y. ^{[1
,2
]}

Hung, H. Y. ^{[3
]}

Chiu, Y. C. ^{[4
]}

Kwo, J. ^{[1
,3
]}

Lee, S. F. ^{[4
]}

Chang, C. R. ^{[2
]}

Lin, J. G. ^{[1
]}

机构：

[1] Natl Taiwan Univ, Ctr Condensed Matter Sci, Taipei 10617, Taiwan

[2] Natl Taiwan Univ, Dept Phys, Taipei 10617, Taiwan

[3] Natl Tsing Hua Univ, Dept Phys, Hsinchu 30013, Taiwan

[4] Acad Sinica, Inst Phys, Taipei 115, Taiwan

来源：

IEEE TRANSACTIONS ON MAGNETICS | 2012年 / 48卷 / 11期

关键词：

Magnetic resonance; spin pumping; ROOM-TEMPERATURE; PHASE-DIAGRAM; SEMICONDUCTORS; LA1-XCAXMNO3; SPINTRONICS; RESISTIVITY; ELECTRONICS; RESONANCE; INSULATOR;

D O I：

10.1109/TMAG.2012.2199288

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Ferromagnetic/paramagnetic bilayer systems have been used to investigate inverse spin-Hall effect (ISHE) extensively with the technique of spin-pumping which is based on a mechanism driving the spin moment from ferromagnetic layers into paramagnetic layers via the ferromagnetic resonance procession. When the spin current is induced in the paramagnetic layer, a transversal electrical potential difference is generated and can be measured. Among many, platinum is the most effective paramagnetic metal with a strong inverse spin-Hall effect due to its strong spin-orbit coupling. In this work, we study ISHE in two kinds of bilayer films, Ni81Fe19(Py)/Pt and La0.7Sr0.3MnO3. Our experimental results show that the voltage induced by ISHE in LSMO/Pt (similar to 1.0 mu V) is one order smaller than that Py/Pt (similar to 10 mu V) at 100 mW of microwave power, despite the fact that LSMO has much higher spin polarization than Py. Based on our fitting results, the reason for the reduction of spin-pumping effect in LSMO/Pt may be the strong anomalous Hall Effect in LSMO.

引用

页码：3958 / 3960

页数：3

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