Domain, magnetic

The direction of the alignment of magnetic moments within a magnetic domain is related to the axes of the crystal lattice by crystalline electric fields and spin-orbit interaction of transition-metal t5 -ions (24). The dependency is given by the magnetocrystalline anisotropy energy expression for a cubic lattice (33) ... 

Technical Magnetic Behavior. When a magnetic-field strength H is appHed to a ferromagnetic or ferrimagnetic material, the latter develops a flux density or iaduction as a result of orientation of the magnetic domains. The relation between B and H is... 

The mechanism for coercivity in the Cr—Co—Fe alloys appears to be pinning of domain walls. The magnetic domains extend through particles of both phases. The evidence from transmission electron microscopy studies and measurement of JT, and anisotropy vs T is that the walls are trapped locally by fluctuations in saturation magnetization. 

Maps of the remanent magnetic domain pattern in the near-surfiice region of magnetic material and thin films can be made routinely. 

Figure 6 Scanning Karr image of the magnetization changes in the indirection for a thin-film head having a 1-MHz, 5-mA p-p coil current, and the magnetic domain pattern deduced for this head from the observed domain wall motion. ...

The second mode of operation is the non-contact mode, in which the distance between tip and sample is much larger, between 2 and 30 nm. In this case one describes the forces in terms of the macroscopic interaction between bodies. Magnetic force microscopy, in which the magnetic domain structure of a solid can be imaged, is an example of the non-contact mode operation. 

For 4t (Uthe relevant perturbation consists in perturbing the covalent (or neutral) VB structures by their interaction with the ionic ones this is the strongly correlated or magnetic domain. So that the Hartree Fock symmetry breaking occurs in a zone which covers the whole magnetic domain and a significant part of the "weakly" correlated domain... 

In their demagnetized states, ferromagnetic metals, such as iron, cobalt, and nickel, consist of randomly magnetized domains separated by well-defined... 

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