Rotational remanent magnetization

Gyro remanent magnetization (GRM) The magnetization acquired by an anisotropic sample during AF demagnetization in a plane perpendicular to the applied AF (see also rotational remanent magnetization, RRM). 

Rotational remanent magnetization (RRM) See gyro remanent magnetization. 

APPLICATION OF MINERAL MAGNETIC TECHNIQUES Gyro rotational remanent magnetisations (GRM/RRM)... 

Finally, we refer to work by Alloul (1979a, b) on zero-field NMR on Cu in CuMn alloys (Mn concentrations from 0.4% to 4.7%) at low temperatures T 0.2 T(, who finds no evidence for independent domain structure. The enhancement factor 7] of the rf-field and NMR signal intensity, associated with the rotation of domain magnetization, is found roughly proportional to the remanent magnetization and is negligible when the sample is ZFC. These results contradict the independent spin-cloud model, for which 17 should be independent of M. A similar conclusion has also been reached from the square hysteresis loops observed well below Tf in CwMn (Monod et al. 1979) and is corroborated by computer simulations of CwMn alloys (Walker and Walstedt 1980). 

If, after the material has been magnetically saturated to the value Bs, the field is reduced to zero, the magnetization vectors rotate out of line with the field towards the nearest preferred direction which is determined in part by magnetocrystalline anisotropy. The magnetization is thus prevented from complete relaxation to the virgin curve and hence, for zero field, there is a remanent induction Bx. In order to reduce the induction to zero a reverse field II,. has to be applied. The coercive field or coercivity II,. depends in part on crystalline anisotropy, as might be expected. 

Magneto-optical properties of the compounds CrTe and Cr3Te4 were investigated by Comstock and Lissberger (1970) and Atkinson (1977), respectively. In both cases the perpendicular remanence ratio was determined by magneto-optical methods and found to be rather low. This is due to an easy magnetization direction parallel to the plane of the thin films on which the measurements were performed. Specific Faraday rotation and Kerr rotation were reported to be low compared to MnBi. 

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