Magnetic Domain Anisotropy Energy

It is shown that in nio the easy directions of magnetization will be either turnrightup eps 1 bar10 or directions very close to turnrightup eps 11 bar2 when the easy plane is 111 and that in either case of easy directions the spontaneous.

Magnetic domain anisotropy energy. The two domains are both lying in the direction of the easy axis so the energy for the anisotropy term is at a minimum. Ea ku sin 2 where is the angle between the. This energy is due to the effect of magnetostriction a slight change in the dimensions of the crystal when magnetized.

E λ is magnetoelastic anisotropy energy. Magnetic anisotropy energy mae is a concept used in the description of certain classes of magnetic phenomena where the magnitude of the magnetization vector varies little while its direction changes significantly. The easy and hard directions arise from the interaction of the spin magnetic moment with the crystal lattice spin orbit coupling.

Magnetic anisotropy energy increases when spins are not oriented in the direction of the easy axis. A general expression of the magnetic anisotropy energy and the magnetoelastic energy in the crystal of magnetic symmetry d 3 d is obtained. Magnetocrystalline anisotropy is the energy necessary to deflect the magnetic moment in a single crystal from the easy to the hard direction.

This means that the domain wall width is determined by the balance betw een the exchange energy and the magnetic anisotropy. The magnetic anisotropy energy which is affected by the symmetry of the crystal structure of the material is called magnetocrystalline anisotropy energy k 1 which is an intrinsic value for each material. However the two magnetic domains are anti parallel with one another so the exchange interaction between the two domains are at an energy maximum.

Magnetocrystalline anisotropy is a phenomenon in which the internal energy magnetic anisotropy energy varies by the direction of magnetization in the material. The material now has a much smaller but still present external magnetic field. The rich world of magnetic microstructure or magnetic domains extending from the nano world.

Magnetic anisotropy energy term has the same symmetry as the crystal struc ture of the material.