Ferromagnetic phenomena

Magnetic order in a crystal can influence the lattice parameters and the elastic moduli. These effects reflect the volume or strain dependence of bandwidth, exchange energy, magnetic dipole energy or crystal-field interaction. Some effects, like linear magnetostriction, are small, λ_s ≈ 10⁻⁵. Others like the  ΔE effect, the change of Young’s modulus associated with domain alignment, can be as large as 90%. Even very small magnetoelastic effects may be critical when optimizing the properties of soft magnets, because of the sensitivity of coercivity to stress-induced anisotropy. Ferromagnetism also influences the thermal, electrical and optical properties of solids. These intrinsic effects in ferromagnets are discussed in the following paragraphs.

مواضيع ذات صلة

عجائب المجالات المغناطيسية

المجال المغناطيسي الارضي

Planetary magnetism

Therapy and treatment

Cellular biology

Magnetotaxis

Magnetic field effects

Electrodeposition

Magnetic memory

Materials for spin electronics

Actuators

Sensors