Remagnetization processes of uniaxial ferromagnetic films with spatially modified parameters

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Аннотация

The study examines the behavior of vortex-like magnetic inhomogeneities that arise in a ferromagnetic disk with spatially modulated uniaxial anisotropy under magnetic fields of varying orientations. The research identifies the characteristic remagnetization stages of the vortex-like inhomogeneities formed in the region of the defect. critical fields of their rearrangement are found and an explanation is given for the difference in the behavior of these inhomogeneities in perpendicular and planar magnetic fields. The effect of the helicity of the magnetic skyrmion localized on the defect on its remagnetization process in the planar field is revealed.

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Авторлар туралы

R. Vakhitov

FSFEI HE Ufa University of Science and Technology

Хат алмасуға жауапты Автор.
Email: vakhitovrm@yahoo.com

The Institute of Physics and Technology

Ресей, 450076, Ufa

A. Akhmetova

FSFEI HE Ufa University of Science and Technology

Email: vakhitovrm@yahoo.com

The Institute of Physics and Technology

Ресей, 450076, Ufa

M. Filippov

FSFEI HE Ufa University of Science and Technology

Email: vakhitovrm@yahoo.com

The Institute of Physics and Technology

Ресей, 450076, Ufa

R. Solonetsky

FSFEI HE Ufa University of Science and Technology

Email: vakhitovrm@yahoo.com

The Institute of Physics and Technology

Ресей, 450076, Ufa

Әдебиет тізімі

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2. Fig. 1. Geometry of the problem. Here (er, ea, ez) are the unit vectors along the corresponding axes in the cylindrical coordinate system (r, α, z).

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3. Fig. 2. Images illustrating the process of remagnetization of a uniaxial ferromagnetic disk with a defect in a perpendicular field. Sample parameters: R = 300 nm, D = 30 nm, R0 = 30 nm, A1 = A2 = 2.5 × 10-13 J/m, Ku1 = 3 × 104 J/m3, Ku2 = -0.5 × 104 J/m3, Ms = 6.6 × 105 A/m (visualization was performed in an environment Ubermag [22]).

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4. Fig. 3. Graph of the dependence of the radius of the skyrmion RV on the radius of the defect R0.

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5. Fig. 4. Images illustrating the process of remagnetization of a uniaxial ferromagnetic disk with a defect in a planar field. Sample parameters: R = 300 nm, D = 30 nm, R0 = 30 nm, A1 = A2 = 2.5 × 10-13 J/m, Ku1 = 3 × 104 J/m3, Ku2 = -0.5 × 104 J/m3, Ms = 6.6 × 105 A/m (visualization was performed in an environment Ubermag [22]).

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