What is magnetocrystalline anisotropy energy?

What is magnetocrystalline anisotropy energy?

Magnetocrystalline anisotropy is the energy necessary to deflect the magnetic moment in a single crystal from the easy to the hard direction. The easy and hard directions arise from the interaction of the spin magnetic moment with the crystal lattice (spin-orbit coupling).

What is magnetocrystalline anisotropy what is its significance in ferromagnetic material?

In physics, a ferromagnetic material is said to have magnetocrystalline anisotropy if it takes more energy to magnetize it in certain directions than in others. These directions are usually related to the principal axes of its crystal lattice. It is a special case of magnetic anisotropy.

How is anisotropy constant calculated?

Crystal anisotropy constant gives the difference between magnetizing the crystal in easy direction (100) and hard direction (111). The formula to find anisotropic constant is Mα Tc = constant. Here, Mα is anisotropic constant and Tc is critical temperature.

How are anisotropy fields calculated?

The anisotropy field is defined as H_aniso = 2*K/J_s, where K is the anisotropy constant and J_s the Saturation magnetization. This Definition is unambiguous only in the case of a uniaxial magnetic anisotropy described with the free Energy f = K*cos^2 phi.

What is anisotropy field?

The anisotropy field represents the hypothetical field that would be able to align the magnetization perpendicular to the easy direction, the c-axis. It is defined by H a = 2 K 1 / J s 0 , where the anisotropy constant characterizes the associated anisotropy energy.

What is the anisotropy constant?

What is anisotropic effect in NMR?

Anisotropic induced magnetic field effects are the result of a local induced magnetic field experienced by a nucleus resulting from circulating electrons that can either be paramagnetic when it is parallel to the applied field or diamagnetic when it is opposed to it.