Slow Domain Wall Motion and Magnetic Domain Structure in Amorphous TbFe Films

Pokhil, Taras; Vvedensky, B.S.; Nikolaev, Evgeny N.

doi:10.4028/www.scientific.net/msf.62-64.619

Cited by 8 publications

(3 citation statements)

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“…If the wall energy can be expanded as a power series of the wall position, [26]. The experimental evidence, over a restricted range of values for the field, cannot distinguish between the different theoretical expressions [60]. The linear approximation should be adequate, at least when the field H is close to the wall coercivity H w .…”

Section: Pinning By Defects Of Low Wall Energymentioning

confidence: 99%

Monte Carlo models of the magnetization reversal in thin films with strong perpendicular anisotropy

Lyberatos

2000

J. Phys. D: Appl. Phys.

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A variety of different models and Monte Carlo algorithms are used to study the magnetization reversal in thin films with perpendicular magnetization. The thin film is represented by a two-dimensional micromagnetic grid or array of classical Ising spins, with long-range dipolar and a short-range effective exchange interaction arising from the contribution of the domain-wall energy. The selection of an appropriate model requires some knowledge of the defects that may be present in the film and their mechanism of interaction with the domain boundary. Magnetic viscosity and equilibrium domain structures are simulated using the Metropolis algorithm with or without an additional energy barrier. Other algorithms are useful when the process of nucleation and growth of magnetic domains involves a wide distribution of relaxation times. We study the relationship between the methods and discuss their relative merits and range of application.

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Section: Pinning By Defects Of Low Wall Energymentioning

confidence: 99%

Monte Carlo models of the magnetization reversal in thin films with strong perpendicular anisotropy

Lyberatos

2000

J. Phys. D: Appl. Phys.

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“…This is controlled by local magnetic inhomogeneities opposing wall motion. 6 In contrast to observation performed in garnets, the domain propagation does not adopt a starlike shape but rather proceeds from a single stripe with only rare branching events.…”

Section: Magnetization Process In Fepd Thin Filmsmentioning

confidence: 97%

Magnetization process in FePd thin films

Klein

Samson

Marty

et al. 2001

Journal of Applied Physics

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A custom made magnetic force microscope is used to study the magnetization process in thin films of FePd throughout the entire hysteresis loop. The 40 nm thick sample has a strong perpendicular anisotropy, which leads to a maze of 80 nm wide stripes of opposite polarity in the remanent state. The growth of M, when H increases, happens through an unwinding of the reversed domain along their axis. Together with the length recession, the reversed domain width also contracts with increasing field. The later effect is estimated by comparison of our images with magneto-optical Kerr measurements. A large disorder in the propagation process of the domain walls is observed. It is also found that the bubble configuration near the saturation field is unstable.

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“…Magnetization reversal is observed to be initiated by nucleation at a small number of sites and followed by dendritic growth of domain walls. More detailed observation of domain wall motion demonstrates that dendritic branches of domain walls move by discrete Barkhausen jumps at the existing domain wall boundaries [21], rather than continuous wall propagation. The unreversed magnetization between dendritic branches diminishes but still exists after a long time unless larger magnetic field is applied.…”

Section: Figurementioning

confidence: 99%

Direct observation of dendritic domain growth in perpendicular magnetic anisotropy CoFe/Pt multilayers

Liu

et al. 2011

Journal of Magnetism and Magnetic Materials

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Slow Domain Wall Motion and Magnetic Domain Structure in Amorphous TbFe Films

Cited by 8 publications

References 0 publications

Monte Carlo models of the magnetization reversal in thin films with strong perpendicular anisotropy

Monte Carlo models of the magnetization reversal in thin films with strong perpendicular anisotropy

Magnetization process in FePd thin films

Direct observation of dendritic domain growth in perpendicular magnetic anisotropy CoFe/Pt multilayers

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