Spin-torque generator engineered by natural oxidation of Cu

被引：146
作者：
An, Hongyu [1 ]
Kageyama, Yuito [1 ]
Kanno, Yusuke [1 ]
Enishi, Nagisa [1 ]
Ando, Kazuya [1 ,2 ]
机构：
[1] Keio Univ, Dept Appl Phys & Physicoinformat, 3-14-1 Hiyoshi, Yokohama, Kanagawa 2238522, Japan
[2] Japan Sci & Technol Agcy, PRESTO, Kawaguchi, Saitama 3320012, Japan
来源：
NATURE COMMUNICATIONS | 2016年 / 7卷
关键词：
ROOM-TEMPERATURE; CONVERSION;
D O I：
10.1038/ncomms13069
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 spin Hall effect is a spin-orbit coupling phenomenon, which enables electric generation and detection of spin currents. This relativistic effect provides a way for realizing efficient spintronic devices based on electric manipulation of magnetization through spin torque. However, it has been believed that heavy metals are indispensable for the spin-torque generation. Here we show that the spin Hall effect in Cu, a light metal with weak spin-orbit coupling, is significantly enhanced through natural oxidation. We demonstrate that the spin-torque generation efficiency of a Cu/Ni81Fe19 bilayer is enhanced by over two orders of magnitude by tuning the surface oxidation, reaching the efficiency of Pt/ferromagnetic metal bilayers. This finding illustrates a crucial role of oxidation in the spin Hall effect, opening a route for engineering the spin-torque generator by oxygen control and manipulating magnetization without using heavy metals.
引用
收藏
页数：8
相关论文
共 59 条
  • [1] Photoinduced inverse spin-Hall effect: Conversion of light-polarization information into electric voltage
    Ando, K.
    Morikawa, M.
    Trypiniotis, T.
    Fujikawa, Y.
    Barnes, C. H. W.
    Saitoh, E.
    [J]. APPLIED PHYSICS LETTERS, 2010, 96 (08)
  • [2] Electric manipulation of spin relaxation using the spin Hall effect
    Ando, K.
    Takahashi, S.
    Harii, K.
    Sasage, K.
    Ieda, J.
    Maekawa, S.
    Saitoh, E.
    [J]. PHYSICAL REVIEW LETTERS, 2008, 101 (03)
  • [3] [Anonymous], PREPRINT
  • [4] X-ray photoelectron spectroscopy characterization of the oxidation of electroplated and sputter deposited copper surfaces
    Apen, E
    Rogers, BR
    Sellers, JA
    [J]. JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS, 1998, 16 (03): : 1227 - 1232
  • [5] Bhowmik D, 2014, NAT NANOTECHNOL, V9, P59, DOI [10.1038/NNANO.2013.241, 10.1038/nnano.2013.241]
  • [6] Frequency and power dependence of spin-current emission by spin pumping in a thin-film YIG/Pt system
    Castel, V.
    Vlietstra, N.
    van Wees, B. J.
    Ben Youssef, J.
    [J]. PHYSICAL REVIEW B, 2012, 86 (13):
  • [7] Scaling Behavior of the Spin Pumping Effect in Ferromagnet-Platinum Bilayers
    Czeschka, F. D.
    Dreher, L.
    Brandt, M. S.
    Weiler, M.
    Althammer, M.
    Imort, I. -M.
    Reiss, G.
    Thomas, A.
    Schoch, W.
    Limmer, W.
    Huebl, H.
    Gross, R.
    Goennenwein, S. T. B.
    [J]. PHYSICAL REVIEW LETTERS, 2011, 107 (04)
  • [8] Inverse spin Hall effect in nanometer-thick yttrium iron garnet/Pt system
    d'Allivy Kelly, O.
    Anane, A.
    Bernard, R.
    Ben Youssef, J.
    Hahn, C.
    Molpeceres, A. H.
    Carretero, C.
    Jacquet, E.
    Deranlot, C.
    Bortolotti, P.
    Lebourgeois, R.
    Mage, J. -C.
    de Loubens, G.
    Klein, O.
    Cros, V.
    Fert, A.
    [J]. APPLIED PHYSICS LETTERS, 2013, 103 (08)
  • [9] Enhanced spin-orbit torques by oxygen incorporation in tungsten films
    Demasius, Kai-Uwe
    Phung, Timothy
    Zhang, Weifeng
    Hughes, Brian P.
    Yang, See-Hun
    Kellock, Andrew
    Han, Wei
    Pushp, Aakash
    Parkin, Stuart S. P.
    [J]. NATURE COMMUNICATIONS, 2016, 7
  • [10] PROPERTIES OF REACTIVELY-SPUTTERED COPPER-OXIDE THIN-FILMS
    DROBNY, VF
    PULFREY, DL
    [J]. THIN SOLID FILMS, 1979, 61 (01) : 89 - 98
123456