Spin relaxation and dephasing mechanism in (Ga,Mn)As studied by time-resolved Kerr rotation

被引：14
作者：
Zhu, Yonggang [1 ]
Zhang, Xinhui [1 ]
Li, Tao [1 ]
Chen, Lin [1 ]
Lu, Jun [1 ]
Zhao, Jianhua [1 ]
机构：
[1] Chinese Acad Sci, Inst Semicond, State Key Lab Superlattices & Microstruct, Beijing 100083, Peoples R China
来源：
APPLIED PHYSICS LETTERS | 2009年 / 94卷 / 14期
基金：
中国国家自然科学基金;
关键词：
Curie temperature; ferromagnetic materials; gallium compounds; Kerr magneto-optical effect; magnetic relaxation; magnetic thin films; manganese compounds; semimagnetic semiconductors; spin dynamics; time resolved spectra; SPINTRONICS; GAAS;
D O I：
10.1063/1.3116716
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Spin dynamics in (Ga,Mn)As films grown on GaAs(001) was investigated by Time-resolved magneto-optical Kerr effect. The Kerr signal decay time of (Ga,Mn)As without external magnetic field applied was found to be several hundreds picoseconds, which suggested that photogenerated polarized holes and magnetic ions are coupled as a ferromagnetic system. Nonmonotonic temperature dependence of relaxation and dephasing (R&D) time and Larmor frequency manifests that Bir-Aronov-Pikus mechanism dominates the spin R&D time at low temperature, while D'yakonov-Perel mechanism dominates the spin R&D time at high temperature, and the crossover between the two regimes is Curie temperature.
引用
收藏
页数：3
相关论文
共 28 条
  • [1] Magnetization manipulation in (Ga,Mn)As by subpicosecond optical excitation
    Astakhov, GV
    Kimel, AV
    Schott, GM
    Tsvetkov, AA
    Kirilyuk, A
    Yakovlev, DR
    Karczewski, G
    Ossau, I
    Schmidt, G
    Molenkamp, LW
    Rasing, T
    [J]. APPLIED PHYSICS LETTERS, 2005, 86 (15) : 1 - 3
  • [2] SPIN-ORBIT COUPLING EFFECTS IN ZINC BLENDE STRUCTURES
    DRESSELHAUS, G
    [J]. PHYSICAL REVIEW, 1955, 100 (02): : 580 - 586
  • [3] Spontaneous spin coherence in n-GaAs produced by ferromagnetic proximity polarization -: art. no. 121202
    Epstein, RJ
    Malajovich, I
    Kawakami, RK
    Chye, Y
    Hanson, M
    Petroff, PM
    Gossard, AC
    Awschalom, DD
    [J]. PHYSICAL REVIEW B, 2002, 65 (12) : 1212021 - 1212024
  • [4] Ultrafast optical control of coercivity in GaMnAs
    Hall, K. C.
    Zahn, J. P.
    Gamouras, A.
    March, S.
    Robb, J. L.
    Liu, X.
    Furdyna, J. K.
    [J]. APPLIED PHYSICS LETTERS, 2008, 93 (03)
  • [5] Photoinduced precession of magnetization in ferromagnetic (Ga,Mn)As
    Hashimoto, Y.
    Kobayashi, S.
    Munekata, H.
    [J]. PHYSICAL REVIEW LETTERS, 2008, 100 (06)
  • [6] Coherent manipulation of magnetization precession in ferromagnetic semiconductor (Ga,Mn)As with successive optical pumping
    Hashimoto, Y.
    Munekata, H.
    [J]. APPLIED PHYSICS LETTERS, 2008, 93 (20)
  • [7] Dynamics of diluted magnetic semiconductors from atomistic spin-dynamics simulations: Mn-doped GaAs
    Hellsvik, J.
    Skubic, B.
    Nordstrom, L.
    Sanyal, B.
    Eriksson, O.
    Nordblad, P.
    Svedlindh, P.
    [J]. PHYSICAL REVIEW B, 2008, 78 (14)
  • [8] Ferromagnetic imprinting of nuclear spins in semiconductors
    Kawakami, RK
    Kato, Y
    Hanson, M
    Malajovich, I
    Stephens, JM
    Johnston-Halperin, E
    Salis, G
    Gossard, AC
    Awschalom, DD
    [J]. SCIENCE, 2001, 294 (5540) : 131 - 134
  • [9] Resonant spin amplification in n-type GaAs
    Kikkawa, JM
    Awschalom, DD
    [J]. PHYSICAL REVIEW LETTERS, 1998, 80 (19) : 4313 - 4316
  • [10] Picosecond dynamics of the photoinduced spin polarization in epitaxial (Ga,Mn)As films
    Kimel, AV
    Astakhov, GV
    Schott, GM
    Kirilyuk, A
    Yakovlev, DR
    Karczewski, G
    Ossau, W
    Schmidt, G
    Molenkamp, LW
    Rasing, T
    [J]. PHYSICAL REVIEW LETTERS, 2004, 92 (23) : 237203 - 1
123