Large spin Hall magnetoresistance and its correlation to the spin-orbit torque in W/CoFeB/MgO structures

被引:157
作者
Cho, Soonha [1 ]
Baek, Seung-heon Chris [1 ,2 ]
Lee, Kyeong-Dong [1 ]
Jo, Younghun [3 ]
Park, Byong-Guk [1 ]
机构
[1] Korea Adv Inst Sci & Technol, Dept Mat Sci & Engn, Taejon 305701, South Korea
[2] Korea Adv Inst Sci & Technol, Dept Elect Engn, Taejon 305701, South Korea
[3] Div Sci Instrumentat KBSI, Taejon 305806, South Korea
来源
SCIENTIFIC REPORTS | 2015年 / 5卷
基金
新加坡国家研究基金会;
关键词
D O I
10.1038/srep14668
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
The phenomena based on spin-orbit interaction in heavy metal/ferromagnet/oxide structures have been investigated extensively due to their applicability to the manipulation of the magnetization direction via the in-plane current. This implies the existence of an inverse effect, in which the conductivity in such structures should depend on the magnetization orientation. In this work, we report a systematic study of the magnetoresistance (MR) of W/CoFeB/MgO structures and its correlation with the current-induced torque to the magnetization. We observe that the MR is independent of the angle between the magnetization and current direction but is determined by the relative magnetization orientation with respect to the spin direction accumulated by the spin Hall effect, for which the symmetry is identical to that of so-called the spin Hall magnetoresistance. The MR of similar to 1% in W/CoFeB/MgO samples is considerably larger than those in other structures of Ta/CoFeB/MgO or Pt/Co/AlOx, which indicates a larger spin Hall angle of W. Moreover, the similar W thickness dependence of the MR and the current-induced magnetization switching efficiency demonstrates that MR in a non-magnet/ferromagnet structure can be utilized to understand other closely correlated spin-orbit coupling effects such as the inverse spin Hall effect or the spin-orbit spin transfer torques.
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页数:9
相关论文
共 35 条
[1]   Quantitative study of the spin Hall magnetoresistance in ferromagnetic insulator/normal metal hybrids [J].
Althammer, Matthias ;
Meyer, Sibylle ;
Nakayama, Hiroyasu ;
Schreier, Michael ;
Altmannshofer, Stephan ;
Weiler, Mathias ;
Huebl, Hans ;
Gepraegs, Stephan ;
Opel, Matthias ;
Gross, Rudolf ;
Meier, Daniel ;
Klewe, Christoph ;
Kuschel, Timo ;
Schmalhorst, Jan-Michael ;
Reiss, Guenter ;
Shen, Liming ;
Gupta, Arunava ;
Chen, Yan-Ting ;
Bauer, Gerrit E. W. ;
Saitoh, Eiji ;
Goennenwein, Sebastian T. B. .
PHYSICAL REVIEW B, 2013, 87 (22)
[2]   Fieldlike and antidamping spin-orbit torques in as-grown and annealed Ta/CoFeB/MgO layers [J].
Avci, Can Onur ;
Garello, Kevin ;
Nistor, Corneliu ;
Godey, Sylvie ;
Ballesteros, Belen ;
Mugarza, Aitor ;
Barla, Alessandro ;
Valvidares, Manuel ;
Pellegrin, Eric ;
Ghosh, Abhijit ;
Miron, Ioan Mihai ;
Boulle, Olivier ;
Auffret, Stephane ;
Gaudin, Gilles ;
Gambardella, Pietro .
PHYSICAL REVIEW B, 2014, 89 (21)
[3]   Theory of spin Hall magnetoresistance [J].
Chen, Yan-Ting ;
Takahashi, Saburo ;
Nakayama, Hiroyasu ;
Althammer, Matthias ;
Goennenwein, Sebastian T. B. ;
Saitoh, Eiji ;
Bauer, Gerrit E. W. .
PHYSICAL REVIEW B, 2013, 87 (14)
[4]   Large planar Hall effect in perpendicularly magnetized W/CoFeB/MgO structures [J].
Cho, Soonha ;
Park, Byong-Guk .
CURRENT APPLIED PHYSICS, 2015, 15 (08) :902-905
[5]   CURRENT-INDUCED SPIN ORIENTATION OF ELECTRONS IN SEMICONDUCTORS [J].
DYAKONOV, MI ;
PEREL, VI .
PHYSICS LETTERS A, 1971, A 35 (06) :459-&
[6]  
Emori S, 2013, NAT MATER, V12, P611, DOI [10.1038/NMAT3675, 10.1038/nmat3675]
[7]   Observation of the nonlocal spin-orbital effective field [J].
Fan, Xin ;
Wu, Jun ;
Chen, Yunpeng ;
Jerry, Matthew J. ;
Zhang, Huaiwu ;
Xiao, John Q. .
NATURE COMMUNICATIONS, 2013, 4
[8]  
Garello K, 2013, NAT NANOTECHNOL, V8, P587, DOI [10.1038/NNANO.2013.145, 10.1038/nnano.2013.145]
[9]   Intrinsic magnetoresistance in metal films on ferromagnetic insulators [J].
Grigoryan, Vahram L. ;
Guo, Wei ;
Bauer, Gerrit E. W. ;
Xiao, Jiang .
PHYSICAL REVIEW B, 2014, 90 (16)
[10]   Comparative measurements of inverse spin Hall effects and magnetoresistance in YIG/Pt and YIG/Ta [J].
Hahn, C. ;
de Loubens, G. ;
Klein, O. ;
Viret, M. ;
Naletov, V. V. ;
Ben Youssef, J. .
PHYSICAL REVIEW B, 2013, 87 (17)