Physics – Geophysics
Scientific paper
Jan 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994georl..21...25y&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 21, no. 1, p. 25-28
Physics
Geophysics
10
Anisotropy, Crystals, Free Energy, Magnetite, Magnetization, Stresses, Thermodynamics, Geophysics, Symmetry, Tables (Data), Temperature, Titanium
Scientific paper
The standard theory of magnetocrystalline anisotropy for a rigid ferromagnetic body, with cubic symmetry, makes use of a `zero strain' anisotropy constant K(sub 1). If the effect of magnetostriction is taken into account, this constant must be replaced by a `zero stress' anisotropy constant K'(sub 1) by a term involving magnetostriction constants and elastic constants. There are also zero strain and zero stress versions of higher order constants (K(sub 2), etc) for cubic symmetry, as well as for other symmetries. The constant K'(sub 1) also appears in dynamic behavior of ferromagnets driven by an applied field, unless the field changes too rapidly for the system to remain in equilibrium. It is predicted that ferromagnetic resonance (FMR) experiments give a direct measurement of K(sub 1).
Merrill Ronald T.
Newell Andrew J.
Ye Jun
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