Evolution and stability of a magnetic vortex in a small cylindrical ferromagnetic particle under applied field

被引:92
作者
Guslienko, KY
Metlov, KL
机构
[1] Acad Sci Czech Republ, Inst Phys, CZ-18221 Prague 8, Czech Republic
[2] Korea Inst Adv Study, Seoul 130012, South Korea
来源
PHYSICAL REVIEW B | 2001年 / 63卷 / 10期
关键词
D O I
10.1103/PhysRevB.63.100403
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The energy of a displaced magnetic vortex in a cylindrical particle made of isotropic ferromagnetic material (magnetic dot) is calculated taking into account the magnetic dipolar and the exchange interactions. Under the simplifying assumption of small dot thickness the closed-form expressions for the dot energy is written in a nonperturbative way as a function of the coordinate of the vortex center. Then, the process of losing the stability of the vol tex under the influence of the externally applied magnetic field is considered. The field destabilizing the vortex as well as the field when the vortex energy is equal to the energy of a uniformly magnetized state are calculated and presented as a function of dot geometry. The results (containing no adjustable parameters) are compared to the recent experiment and are in good agreement.
引用
收藏
页数:4
相关论文
共 14 条
  • [2] Single-domain circular nanomagnets
    Cowburn, RP
    Koltsov, DK
    Adeyeye, AO
    Welland, ME
    Tricker, DM
    [J]. PHYSICAL REVIEW LETTERS, 1999, 83 (05) : 1042 - 1045
  • [3] Property variation with shape in magnetic nanoelements
    Cowburn, RP
    [J]. JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2000, 33 (01) : R1 - R16
  • [4] Nucleation and annihilation of magnetic vortices in submicron-scale Co dots
    Fernandez, A
    Cerjan, CJ
    [J]. JOURNAL OF APPLIED PHYSICS, 2000, 87 (03) : 1395 - 1401
  • [5] Reorientational magnetic transition in high-density arrays of single-domain dots
    Guslienko, KY
    Choe, SB
    Shin, SC
    [J]. APPLIED PHYSICS LETTERS, 2000, 76 (24) : 3609 - 3611
  • [6] METLOV KL, CONDMAT0012146
  • [7] Permalloy cylindrical submicron size dot arrays
    Miramond, C
    Fermon, C
    Rousseaux, F
    Decanini, D
    Carcenac, F
    [J]. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1997, 165 (1-3) : 500 - 503
  • [8] Spin vortex states and hysteretic properties of submicron size NiFe elements
    Pokhil, T
    Song, DA
    Nowak, J
    [J]. JOURNAL OF APPLIED PHYSICS, 2000, 87 (09) : 6319 - 6321
  • [9] Magnetization pattern of ferromagnetic nanodisks
    Raabe, J
    Pulwey, R
    Sattler, R
    Schweinböck, T
    Zweck, J
    Weiss, D
    [J]. JOURNAL OF APPLIED PHYSICS, 2000, 88 (07) : 4437 - 4439
  • [10] Lorentz microscopy of circular ferromagnetic permalloy nanodisks
    Schneider, M
    Hoffmann, H
    Zweck, J
    [J]. APPLIED PHYSICS LETTERS, 2000, 77 (18) : 2909 - 2911