Verformungs‐ und Temperaturabhängigkeit der Magnetisierungsprozesse in Nickeleinkristallen II. Blochwandverschiebungen und Drehungen der spontanen Magnetisierung in 〈001〉‐Nickeleinkristallen

Köster, E.

doi:10.1002/pssb.19670190218

Cited by 8 publications

(1 citation statement)

References 17 publications

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“…In the last energy term only the interaction between dislocations and domain walls, characterized by the interaction constant R, is considered. The influence of the magnetoelastic coupling energy on the rotation of the magnetization in the ferromagnetic domains [ll] corresponds to an energy density of the order of lo4 erg/cm3 according to measurements on nickel single crystals [12]. Even if one allows for the larger magnetostriction constants of cobalt the magnetoelastic energy contribution to rotation is negligible compared with the crystalline anisotropy energy of cobalt.…”

Section: Evaluation Of Experimental Resultsmentioning

confidence: 99%

Magnetization and Magnetostriction of Hexagonal Cobalt Single Crystals with Internal Stresses

Köster

1968

Physica Status Solidi (b)

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Measurements of magnetization and magnetostrictive changes of the length were carried out on a plastically deformed cobalt single crystal a t low magnetic fields. The results are in good agreement with theoretical calculations by Kronmuller et al. [l]. From this it is concluded that the magnetization processes within the closure structure of ferromagnetic domains at the crystal surface have no noticeable influence on the magnetization compared with the processes in the crystal volume.

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Section: Evaluation Of Experimental Resultsmentioning

confidence: 99%

Magnetization and Magnetostriction of Hexagonal Cobalt Single Crystals with Internal Stresses

Köster

1968

Physica Status Solidi (b)

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General Micromagnetic Theory

Kronmüller¹

2007

Handbook of Magnetism and Advanced Magnetic Materials

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The objective of this contribution is a review of the principles of the continuum theory of micromagnetism and to show its applications to the main static and dynamic problems of ferromagnetic materials. Micromagnetism as a continuum theory closes the gap between quantum theory, dealing with atomic scales and the Maxwell theory dealing with macroscopic dimensions. Micromagnetism therefore corresponds to the tool to deal with nano‐ and microscales. Micromagnetism has become an indispensable theory for a fundamental understanding of magnetic domain configurations, magnetization processes and the interaction between magnetization and microstructures. After Landau–Lifshitz's wall calculations in 1935 and Brown's publication of the so‐called Brown's micromagnetic equations in 1940/1941, micromagnetism became the standard method to analyze the basic magnetic properties of ferromagnetic materials in the range of nano‐ and microscales. The following review gives a brief presentation of the different energy terms involved in the magnetic Gibbs free energy and a derivation of the micromagnetic equilibrium conditions and of the effective field. Some characteristic applications illustrate the effectiveness of micromagnetism in the case of domain walls, nucleation problems, interaction with microstructures, domain patterns, and the dynamics of magnetization processes. This contribution also gives a definition of the different exchange lengths related to dipolar fields, magnetocrystalline anisotropy energy, magnetostatic energy of external fields and the magnetoelastic coupling energy. Whereas only a few cases exist where analytical solutions of the highly nonlinear micromagnetic equations are available the progress in computational micromagnetism allowed the numerical solution of many open problems, which will be treated in the following contributions by Miltat et al. , Schrefl et al. and D. Goll.

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Magnetic studies on cyclically deformed α-iron single crystals

Mughrabi

Kütterer

Lubitz

et al. 1976

Phys. Stat. Sol. (a)

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In α‐iron single crystals orientated for single slip the dislocation arrangement formed during cyclic deformation at controlled plastic strain amplitude is investigated with the aid of measurements of magnetic properties (coercive field and reversible susceptibility in the approach to magnetic saturation). These observations are related to the athermal component of the peak stress. Significant changes of the magnetic properties are not confined to the rapid hardening stage but persist into the cyclic saturation regime. This finding may be related to the formation of a dislocation arrangement of low internal stresses (dislocation cell structure), in agreement with recent transmission electron microscopy observations. It is shown furthermore that the dislocation arrangements produced during cyclic deformation differ considerably in their contribution to the athermal stress component from those formed as a result of tensile deformation.

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Verformungs‐ und Temperaturabhängigkeit der Magnetisierungsprozesse in Nickeleinkristallen II. Blochwandverschiebungen und Drehungen der spontanen Magnetisierung in 〈001〉‐Nickeleinkristallen

Abstract: Die Magnetisierung und die magnetastriktive Liingeniinderung stabformiger Nickeleinkristalle mit Show more

Cited by 8 publications

References 17 publications

Magnetization and Magnetostriction of Hexagonal Cobalt Single Crystals with Internal Stresses

Magnetization and Magnetostriction of Hexagonal Cobalt Single Crystals with Internal Stresses

General Micromagnetic Theory

Magnetic studies on cyclically deformed α-iron single crystals

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