Room-temperature photoinduced magnetoresistance effect in GaAs including MnSb nanomagnets

被引:27
作者
Akinaga, H
Mizuguchi, M
Ono, K
Oshima, M
机构
[1] Natl Inst Adv Interdisciplinary Res, Joint Res Ctr Atom Technol, Tsukuba, Ibaraki 3058562, Japan
[2] Electrotech Lab, Tsukuba, Ibaraki 3058568, Japan
[3] Univ Tokyo, Grad Sch Engn, Bunkyo Ku, Tokyo 1138656, Japan
关键词
D O I
10.1063/1.126421
中图分类号
O59 [应用物理学];
学科分类号
摘要
We show a photoinduced positive magnetoresistance (MR) effect (about 20%) under a low magnetic field (less than 0.1 T) at room temperature. The photoinduced MR effect has been observed in GaAs including nanoscale MnSb islands, when photons with the energy above the band gap of GaAs irradiated the sample. The photoinduced phenomena are due to an enhancement of tunneling probability between MnSb islands by photogenerated carriers in the GaAs matrix. (C) 2000 American Institute of Physics. [S0003-6951(00)02718-2].
引用
收藏
页码:2600 / 2602
页数:3
相关论文
共 18 条
  • [1] ADACHI K, 1988, LANDOLTBORNSTEIN A, V27, P148
  • [2] Structural and magnetic properties of epitaxial (0001) MnSb thin films grown on (111) B GaAs: Influence of interface quality
    Akinaga, H
    Miyanishi, S
    VanRoy, W
    Kuo, LH
    [J]. APPLIED PHYSICS LETTERS, 1997, 70 (18) : 2472 - 2474
  • [3] Negative magnetoresistance in GaAs with magnetic MnAs nanoclusters
    Akinaga, H
    De Boeck, J
    Borghs, G
    Miyanishi, S
    Asamitsu, A
    Van Roy, W
    Tomioka, Y
    Kuo, LH
    [J]. APPLIED PHYSICS LETTERS, 1998, 72 (25) : 3368 - 3370
  • [4] Room-temperature thousandfold magnetoresistance change in MnSb granular films: Magnetoresistive switch effect
    Akinaga, H
    Mizuguchi, M
    Ono, K
    Oshima, M
    [J]. APPLIED PHYSICS LETTERS, 2000, 76 (03) : 357 - 359
  • [5] Uniaxial magnetic anisotropy of submicron MnAs ferromagnets in GaAs semiconductors
    Ando, K
    Chiba, A
    Tanoue, H
    [J]. APPLIED PHYSICS LETTERS, 1998, 73 (03) : 387 - 389
  • [6] GIANT MAGNETORESISTANCE IN HETEROGENEOUS CU-CO ALLOYS
    BERKOWITZ, AE
    MITCHELL, JR
    CAREY, MJ
    YOUNG, AP
    ZHANG, S
    SPADA, FE
    PARKER, FT
    HUTTEN, A
    THOMAS, G
    [J]. PHYSICAL REVIEW LETTERS, 1992, 68 (25) : 3745 - 3748
  • [7] LIGHT-INDUCED MAGNETIC EXCHANGE-COUPLING
    BRINER, B
    LANDOLT, M
    [J]. ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER, 1993, 92 (02): : 137 - 139
  • [8] THEORY OF INTRINSIC AND THERMALLY-INDUCED INTERLAYER MAGNETIC COUPLING BETWEEN FERROMAGNETIC-FILMS SEPARATED BY AN INSULATING LAYER
    BRUNO, P
    [J]. PHYSICAL REVIEW B, 1994, 49 (18): : 13231 - 13234
  • [9] An X-ray-induced insulator-metal transition in a magnetoresistive manganite
    Kiryukhin, V
    Casa, D
    Hill, JP
    Keimer, B
    Vigliante, A
    Tomioka, Y
    Tokura, Y
    [J]. NATURE, 1997, 386 (6627) : 813 - 815
  • [10] Ferromagnetic order induced by photogenerated carriers in magnetic III-V semiconductor heterostructures of (In,Mn)As/GaSb
    Koshihara, S
    Oiwa, A
    Hirasawa, M
    Katsumoto, S
    Iye, Y
    Urano, C
    Takagi, H
    Munekata, H
    [J]. PHYSICAL REVIEW LETTERS, 1997, 78 (24) : 4617 - 4620