Articles written in Bulletin of Materials Science
Volume 2 Issue 3 August 1980 pp 187-192
The exchange constants in the ferrimagnetic garnets R3 Fe5 O12 (R=Y3+, Gd3+ and Dy3+) have been obtained from the experimental data on saturation magnetisation and inverse susceptibility. The sign and magnitude of the exchange constants in Y3Fe5O12 have been explained on the basis of Anderson’s theory of superexchange. The low temperature magnetisation data in Dy3Fe5O12 have been explained by assuming canting on the
Volume 6 Issue 1 February 1984 pp 65-70
The dependence of microstructure on sintering conditions during hot pressing have been investigated and the densification mechanisms have been used to explain the observed results. The effect of addition of excess ZnO content over stoichiometry on permeability has been studied in the normal sintered Mn-Zn ferrites.
Volume 6 Issue 6 December 1984 pp 1069-1074
The exchange constants observed in the rare earth iron garnets, obtained from fitting magnetization and paramagnetic susceptibility as a function of temperature have been analysed in terms of Anderson’s theory of superexchange. The transfer integrals and covalency parameters have been obtained for various rare earth ions overlapping with oxygen.
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