Interlayer dependent polarity of magnetoresistance in graphene spin valves

被引：36
|
作者：
Iqbal, M. Z. [1 ,2 ]
Iqbal, M. W. [1 ,2 ]
Jin, Xiaozhan [3 ]
Hwang, Changyong [3 ]
Eom, Jonghwa [1 ,2 ]
机构：
[1] Sejong Univ, Dept Phys, Seoul 143747, South Korea
[2] Sejong Univ, Graphene Res Inst, Seoul 143747, South Korea
[3] Korea Res Inst Stand & Sci, Ctr Nanometrol, Taejon 305340, South Korea
来源：
JOURNAL OF MATERIALS CHEMISTRY C | 2015年 / 3卷 / 02期
基金：
新加坡国家研究基金会;
关键词：
MAGNETIC TUNNEL-JUNCTIONS; ROOM-TEMPERATURE; TRANSPORT; BARRIER; FILMS;
D O I：
10.1039/c4tc02389g
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We fabricated spin valves of NiFe/Al2O3/single layer graphene (SLG)/Co, NiFe/SLG/Co, and NiFe/Al2O3/Co. In the fabrication, lithography processes using e-beam resist or photoresist were avoided to obtain residue-free clean junctions in all devices. While all three types of magnetic junctions showed a distinctly clear spin valve effect from 10 to 300 K, the polarity of magnetoresistance (MR) revealed different signs. A negative MR value (-1.6% at 10 K) was observed in the spin valve effect for the junction with the Al2O3/SLG interlayer, however the other types of junctions showed conventional positive MR values. The positive or negative MR signs are explained by the Julliere model of spin-dependent tunneling.
引用
收藏
页码：298 / 302
页数：5
相关论文
共 50 条
  • [21] Giant magnetoresistance in organic spin-valves
    Xiong, ZH
    Wu, D
    Vardeny, ZV
    Shi, J
    [J]. NATURE, 2004, 427 (6977) : 821 - 824
  • [22] The effect of dimerization on the magnetoresistance in organic spin valves
    王辉
    胡贵超
    任俊峰
    [J]. Chinese Physics B, 2013, (05) : 618 - 623
  • [23] Tunneling anisotropic magnetoresistance in organic spin valves
    Gruenewald, M.
    Wahler, M.
    Schumann, F.
    Michelfeit, M.
    Gould, C.
    Schmidt, R.
    Wuerthner, F.
    Schmidt, G.
    Molenkamp, L. W.
    [J]. PHYSICAL REVIEW B, 2011, 84 (12):
  • [24] Nonlinear Giant Magnetoresistance in Dual Spin Valves
    Aziz, A.
    Wessely, O. P.
    Ali, M.
    Edwards, D. M.
    Marrows, C. H.
    Hickey, B. J.
    Blamire, M. G.
    [J]. PHYSICAL REVIEW LETTERS, 2009, 103 (23)
  • [25] Length dependence of magnetoresistance in organic spin valves
    Li, Dan
    Zhang, Huiqing
    Miao, Yuanyuan
    Ren, Junfeng
    Wang, Chuankui
    Hu, Guichao
    [J]. JOURNAL OF APPLIED PHYSICS, 2022, 131 (05)
  • [26] Enhanced magnetoresistance in lateral spin-valves
    Adari, R.
    Patil, T.
    Murthy, M.
    Maheshwari, R.
    Vaidya, G.
    Ganguly, S.
    Saha, D.
    [J]. APPLIED PHYSICS LETTERS, 2010, 97 (11)
  • [27] Giant magnetoresistance in organic spin-valves
    Z. H. Xiong
    Di Wu
    Z. Valy Vardeny
    Jing Shi
    [J]. Nature, 2004, 427 : 821 - 824
  • [28] The effect of dimerization on the magnetoresistance in organic spin valves
    Wang Hui
    Hu Gui-Chao
    Ren Jun-Feng
    [J]. CHINESE PHYSICS B, 2013, 22 (05)
  • [29] Resonant magnetoresistance in organic spin valves (invited)
    Rocha, A. Reily
    Sanvito, S.
    [J]. JOURNAL OF APPLIED PHYSICS, 2007, 101 (09)
  • [30] Spin valves with interlayer coupling domain biasing
    Lu, ZQ
    Pan, G
    [J]. APPLIED PHYSICS LETTERS, 2002, 80 (17) : 3156 - 3158
12345