Magnetostriction
المؤلف:
J. M. D. COEY
المصدر:
Magnetism and Magnetic Materials
الجزء والصفحة:
238
23-2-2021
1926
Magnetostriction
Local stress may also be generated by the magnetostriction of the ferromagnetic material itself. Stresses only arise if the magnetostrictive strains are frustrated. The corresponding strain energy is
Here pe is the deviation from the nonmagnetostrictive state, ∈ is the strain in the freely deformed state and c is the tensor of elastic constants. c · ( pe − ∈) is the magnetostrictive stress σ. Thankfully this term is usually small, < 1 kJ m−3.
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