Calculation of intrinsic coercivity of magnetic domain walls in perfect crystals

Broek, Jan van den; Zijlstra, H.

doi:10.1109/tmag.1971.1067036

Cited by 129 publications

(33 citation statements)

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“…Since this compound has a value of magnetic anisotropy (--lo8 erg/cm3) comparable with the exchange energy, the walls are narrow (several inter-atomic parameters). As we known, such walls have a high intrinsing coercivity [29]. This fact explains in our opinion the high magnetic hysteresis in the AF-F transition.…”

supporting

confidence: 64%

3d-4f METALLIC COMPOUNDS.Magnetic moment, magnetic anisotropy and spin-reorientation phase transition in (4f-3d)-intermetallic compounds

Deryagin¹

1979

J. Phys. Colloques

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supporting

confidence: 64%

3d-4f METALLIC COMPOUNDS.Magnetic moment, magnetic anisotropy and spin-reorientation phase transition in (4f-3d)-intermetallic compounds

Deryagin¹

1979

J. Phys. Colloques

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“…In that case the potential hindering the DWM is approximately sinusoidal 20 with the amplitude proportional to 21 exp͑Ϫ␦/⌳͒, and hence significant only when the wall thickness ␦ is not much larger than the lattice period in the direction perpendicular to the wall, ⌳. For DyFe 11 Ti at TϾT 2 , a simple 180°domain structure is expected with the walls lying in the ͑110͒ planes; hence ⌳ϭa/ͱ2Ϸ6 Å.…”

Section: Ac Susceptibility Due To Dwmmentioning

confidence: 99%

ac susceptibility of aDyFe11Ti single crystal

et al. 1996

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A study of the ac initial magnetic susceptibility of a roughly spherical single crystal of DyFe 11 Ti is reported. Both the real and imaginary parts of the complex susceptibility have been measured in absolute units along the principal crystallographic directions, the results being practically identical for ͓100͔ and ͓110͔. The underlying mechanisms-coherent magnetization rotation and domain-wall motion-are considered. It is demonstrated that the thermally activated domain-wall displacements provide the clue to understanding the main features of the temperature dependence of both the real and imaginary parts of the observed susceptibility.

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“…Complementary, the transition from Bloch to linear walls at T = 0 depending on the anisotropy was investigated by van den Broek and Zijlstra [22] with numerical methods. It was found that LWs are realized if the ratio of the anisotropy energy to the exchange one exceeds 2/3; the DW width δ, is in this case, comparable with the lattice spacing a 0 .…”

Section: Introductionmentioning

confidence: 99%

Bloch-wall phase transition in the spherical model

Garanin

1996

J. Phys. A: Math. Gen.

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The temperature-induced second-order phase transition from Bloch to linear (Ising-like) domain walls in uniaxial ferromagnets is investigated for the model of D-component classical spin vectors in the limit D → ∞. This exactly soluble model is equivalent to the standard spherical model in the homogeneous case, but deviates from it and is free from unphysical behavior in a general inhomogeneous situation. It is shown that the thermal fluctuations of the transverse magnetization in the wall (the Bloch-wall order parameter) result in the diminishing of the wall transition temperature TB in comparison to its mean-field value, thus favouring the existence of linear walls. For finite values of TB an additional anisotropy in the basis plane x, y is required; in purely uniaxial ferromagnets a domain wall behaves like a 2-dimensional system with a continuous spin symmetry and does not order into the Bloch one. †

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Calculation of intrinsic coercivity of magnetic domain walls in perfect crystals

Cited by 129 publications

References 1 publication

3d-4f METALLIC COMPOUNDS.Magnetic moment, magnetic anisotropy and spin-reorientation phase transition in (4f-3d)-intermetallic compounds

3d-4f METALLIC COMPOUNDS.Magnetic moment, magnetic anisotropy and spin-reorientation phase transition in (4f-3d)-intermetallic compounds

ac susceptibility of aDyFe11Ti single crystal

Bloch-wall phase transition in the spherical model

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