Ultrafast laser-induced magnetization precession dynamics in FePt/CoFe exchange-coupled films

被引：19
|
作者：
Zhang, Zongzhi [1 ]
Cui, Boyin [1 ]
Wang, Guangzhong [1 ]
Ma, B. [1 ]
Jin, Q. Y. [1 ]
Liu, Yaowen [2 ]
机构：
[1] Fudan Univ, Minist Educ, Key Lab Micro & Nano Photon Struct, Dept Opt Sci & Engn,Lab Adv Mat, Shanghai 200433, Peoples R China
[2] Tongji Univ, Dept Phys, Shanghai 200092, Peoples R China
来源：
APPLIED PHYSICS LETTERS | 2010年 / 97卷 / 17期
关键词：
COMPOSITE MEDIA;
D O I：
10.1063/1.3510473
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Femtosecond laser-triggered magnetization precession dynamics in exchange-coupled hard FePt/soft CoFe films has been studied by the time-resolved magneto-optical Kerr effect. The precession frequency is shown to be independent of the CoFe thickness t(CoFe), while linearly proportional to the external field for the sample with t(CoFe) = 7 nm, implying that the magnetization relaxation is governed by a uniform precession mode. The result agrees well with the theoretical prediction based on the Landau-Lifshitz-Gilbert equation. The obtained damping factor alpha similar to 0.13 is quite large and is thought to be dominated by the FePt layer. Additionally, the oscillation amplitude strongly depends on the CoFe thickness with a maximum value occurred at t(CoFe) = 7 nm. (C) 2010 American Institute of Physics. [doi:10.1063/1.3510473]
引用
收藏
页数：3
相关论文
共 50 条
  • [21] Exchange-coupled L10-FePt/Fe composite patterns with perpendicular magnetization
    Breitling, A.
    Bublat, T.
    Goll, D.
    PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS, 2009, 3 (05): : 130 - 132
  • [22] Magnetization dynamics in an exchange-coupled NiFe/CoFe bilayer studied by x-ray detected ferromagnetic resonance
    Stenning, G. B. G.
    Shelford, L. R.
    Cavill, S. A.
    Hoffmann, F.
    Haertinger, M.
    Hesjedal, T.
    Woltersdorf, G.
    Bowden, G. J.
    Gregory, S. A.
    Back, C. H.
    de Groot, P. A. J.
    van der Laan, G.
    NEW JOURNAL OF PHYSICS, 2015, 17
  • [23] Laser-induced magnetization dynamics
    Koopmans, B
    SPIN DYNAMICS IN CONFINED MAGNETIC STRUCTURES II, 2003, 87 : 253 - 316
  • [24] TEM INVESTIGATION OF THE MAGNETIZATION PROCESSES IN EXCHANGE-COUPLED MULTILAYER FILMS
    HEYDERMAN, LJ
    CHAPMAN, JN
    PARKIN, SSP
    JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1994, 138 (03) : 344 - 354
  • [25] Investigation of magnetization change in GdFeCo/DyFeCo exchange-coupled films
    Zhang, YP
    Wang, XY
    Lin, GQ
    Li, Z
    Li, ZY
    Shen, DF
    Gan, FX
    ACTA PHYSICA SINICA, 2004, 53 (02) : 614 - 619
  • [26] Magnetization dynamics in exchange-coupled spring systems with perpendicular anisotropy
    Monteiro, Pedro M. S.
    Schmool, D. S.
    PHYSICAL REVIEW B, 2010, 81 (21):
  • [27] Coupled precession modes in indirect exchange-coupled [Pt/Co]-Co thin films
    Michalski, Steven
    Zhou, Jian
    Skomski, Ralph
    Kirby, Roger D.
    JOURNAL OF APPLIED PHYSICS, 2007, 101 (09)
  • [28] Laser-induced precession of magnetization in ferrimagnetic GdFe thin films with low power excitation
    Nishibayashi, K.
    Kuga, K.
    Munekata, H.
    AIP ADVANCES, 2013, 3 (03):
  • [29] Effect of magnetic anisotropy relaxation on laser-induced magnetization precession in thin galfenol films
    Gerevenkov, P., I
    Kuntu, D., V
    Filatov, Ia A.
    Shelukhin, L. A.
    Wang, M.
    Pattnaik, D. P.
    Rushforth, A. W.
    Kalashnikova, A. M.
    Khokhlov, N. E.
    PHYSICAL REVIEW MATERIALS, 2021, 5 (09):
  • [30] Magnetic Reversal Behaviors of Perpendicular Exchange-Coupled Fe/FePt Bilayer Films
    Sun, An-Cheng
    Yuan, Fu-Te
    Hsu, Jen-Hwa
    Lin, Y. H.
    Kuo, P. C.
    IEEE TRANSACTIONS ON MAGNETICS, 2009, 45 (06) : 2709 - 2715
12345