Model of thermally activated magnetization reversal in thin films of amorphous rare-earth-transition-metal alloys

Lyberatos, A.; Earl, J.S.; Chantrell, R.W.

doi:10.1103/physrevb.53.5493

Cited by 55 publications

(63 citation statements)

References 35 publications

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“…However, the perpendicular media is also relatively stable around the coercivity point, because the demagnetization effects are minimal in that region. Therefore, most reversal happens before the coercivity point is reached and closer to the nucleation point where the demagnetization fields are strong [12]. With regard to point (2), the large value of S is directly related to the avalanche effect caused by the very strong IG exchange coupling interactions in that sample.…”

Section: Figs 4(b) and (C) Show The Virgin Hysteresis And Irm Scans mentioning

confidence: 95%

Thermal stability and the magnetization process in CoCrPt–SiO2 perpendicular recording media

Srinivasan

Piramanayagam

Sbiaa

et al. 2008

Journal of Magnetism and Magnetic Materials

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Section: Figs 4(b) and (C) Show The Virgin Hysteresis And Irm Scans mentioning

confidence: 95%

Thermal stability and the magnetization process in CoCrPt–SiO2 perpendicular recording media

Srinivasan

Piramanayagam

Sbiaa

et al. 2008

Journal of Magnetism and Magnetic Materials

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“…Other possible sources are the dipolar interactions as well as the dynamics of the model (see e.g. [14] for a discussion of the shape of domains in a model without disorder).…”

Section: Dynamics and Temperature Dependencementioning

confidence: 99%

Domain dynamics of magnetic films with perpendicular anisotropy

Nowak¹,

Heimel²,

Kleinefeld³

et al. 1997

Phys. Rev. B

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We study the magnetic properties of nanoscale magnetic films with large perpendicular anisotropy comparing polarization microscopy measurements on Co28Pt72 alloy samples based on the magneto-optical Kerr effect with Monte Carlo simulations of a corresponding micromagnetic model. In our model the magnetic film is described in terms of single-domain magnetic grains, interacting via exchange as well as via dipolar forces. Additionally, the model contains an energy barrier which has to be overcome in order to reverse a single cell and a coupling to an external magnetic field. Disorder is taken into account.We focus on the understanding of the dynamics especially the temperature and field dependence of the magnetisation reversal process. The experimental and simulational results for hysteresis, the reversal mechanism, domain configurations during the reversal, and the time dependence of the magnetisation are in very good qualitative agreement. The results for the field and temperature dependence of the domain wall velocity suggest that for thin films the hysteresis can be described as a depinning transition of the domain walls rounded by thermal activation for finite temperatures. 75.60.Ch, 75.60.Ej, 75.40.Mg

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“…Different metastable domain structures can be found at remanence in this kind of amorphous rare earth-transition metal films: 13,18 from parallel stripe domains with alternating sign of the out-of-plane magnetization component as shown in the MFM image of Fig. 1(b) after applying a large inplane magnetic field to disordered labyrinthine configurations, which are often observed after applying out-of-plane magnetic fields.…”

Section: Methodsmentioning

confidence: 99%

Imprinted labyrinths and percolation in Nd-Co/Nb magnetic/superconducting hybrids

Ruiz-Valdepeñas

Vélez

Valdés-Bango

et al. 2014

Journal of Applied Physics

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Magnetization reversal processes have been studied in hybrid magnetic/superconducting Nd-Co/Nb bilayers by the comparison of out-of-plane magnetic hysteresis loops and superconducting phase diagrams as a function of magnetic layer thickness and of disorder in the magnetic layer induced by a nanostructured copolymer template. A good correlation is found between the regimes corresponding to percolation effects in the superconductor and to the transition from extended to confined superconductivity with the characteristic fields for reverse domain nucleation and fast domain expansion in the magnetic layer, indicating that superconductivity nucleates on the disordered network imprinted on the superconducting layer by the labyrinth domain structure of the magnetic layer. As disorder increases in the magnetic layer, percolation effects disappear from the superconducting transitions in agreement with a more homogeneous magnetization reversal process.

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Model of thermally activated magnetization reversal in thin films of amorphous rare-earth-transition-metal alloys

Cited by 55 publications

References 35 publications

Thermal stability and the magnetization process in CoCrPt–SiO2 perpendicular recording media

Thermal stability and the magnetization process in CoCrPt–SiO2 perpendicular recording media

Domain dynamics of magnetic films with perpendicular anisotropy

Imprinted labyrinths and percolation in Nd-Co/Nb magnetic/superconducting hybrids

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