Magnetic vortex core dynamics in cylindrical ferromagnetic dots

被引：220
作者：
Guslienko, KY
Han, XF
Keavney, DJ
Divan, R
Bader, SD
机构：
[1] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA
[2] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA
来源：
PHYSICAL REVIEW LETTERS | 2006年 / 96卷 / 06期
关键词：
D O I：
10.1103/PhysRevLett.96.067205
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We report direct imaging by means of x-ray photoemission electron microscopy of the dynamics of magnetic vortices confined in micron-sized circular permalloy dots that are 30 nm thick. The vortex core positions oscillate on a 10 ns time scale in a self-induced magnetostatic potential well after the in-plane magnetic field is turned off. The measured oscillation frequencies as a function of the aspect ratio of the dots are in agreement with theoretical calculations presented for the same geometry.
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页数：4
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共 25 条
  • [1] BELAVIN AA, 1975, JETP LETT+, V22, P245
  • [2] Vortex core-driven magnetization dynamics
    Choe, SB
    Acremann, Y
    Scholl, A
    Bauer, A
    Doran, A
    Stöhr, J
    Padmore, HA
    [J]. SCIENCE, 2004, 304 (5669) : 420 - 422
  • [3] Single-domain circular nanomagnets
    Cowburn, RP
    Koltsov, DK
    Adeyeye, AO
    Welland, ME
    Tricker, DM
    [J]. PHYSICAL REVIEW LETTERS, 1999, 83 (05) : 1042 - 1045
  • [4] Spin excitations of nanometric cylindrical dots in vortex and saturated magnetic states
    Giovannini, L
    Montoncello, F
    Nizzoli, F
    Gubbiotti, G
    Carlotti, G
    Okuno, T
    Shinjo, T
    Grimsditch, M
    [J]. PHYSICAL REVIEW B, 2004, 70 (17) : 1 - 4
  • [5] Boundary conditions for magnetization in magnetic nanoelements
    Guslienko, KY
    Slavin, AN
    [J]. PHYSICAL REVIEW B, 2005, 72 (01):
  • [6] Vortex-state oscillations in soft magnetic cylindrical dots
    Guslienko, KY
    Scholz, W
    Chantrell, RW
    Novosad, V
    [J]. PHYSICAL REVIEW B, 2005, 71 (14):
  • [7] Eigenfrequencies of vortex state excitations in magnetic submicron-size disks
    Guslienko, KY
    Ivanov, BA
    Novosad, V
    Otani, Y
    Shima, H
    Fukamichi, K
    [J]. JOURNAL OF APPLIED PHYSICS, 2002, 91 (10) : 8037 - 8039
  • [8] Magnetization reversal due to vortex nucleation, displacement, and annihilation in submicron ferromagnetic dot arrays
    Guslienko, KY
    Novosad, V
    Otani, Y
    Shima, H
    Fukamichi, K
    [J]. PHYSICAL REVIEW B, 2002, 65 (02) : 244141 - 2441410
  • [9] Field evolution of magnetic vortex state in ferromagnetic disks
    Guslienko, KY
    Novosad, V
    Otani, Y
    Shima, H
    Fukamichi, K
    [J]. APPLIED PHYSICS LETTERS, 2001, 78 (24) : 3848 - 3850
  • [10] DYNAMICS OF SPIN VORTICES IN TWO-DIMENSIONAL PLANAR MAGNETS
    HUBER, DL
    [J]. PHYSICAL REVIEW B, 1982, 26 (07): : 3758 - 3765
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