Magnetic materials

Abstract

Magnetic materials consist of a wide variety of metals and oxides. Their effective properties are given by a combination of two property categories: intrinsic properties which are the atomic moment per atom pat, Curie temperature Tc, magnetocrystalline anisotropy coefficients Ki, and magnetostriction coefficients λi; as well as extrinsic properties which are essentially their coercivity Hc and their magnetization M or magnetic induction J as a function of the applied magnetic field H. Moreover, the effective properties are depending decisively on the microstructural features, texture and, in most cases, on the external geometric dimensions such as thickness or shape of the magnetic part. In some cases nonmagnetic inorganic and organic compounds serve as binders or magnetic insulators in multiphase or composite magnetic materials.