Magnetic properties and molecular field coefficients of Er6(Fe1-xMnx)23
- 1 March 1978
- journal article
- Published by IOP Publishing in Journal of Physics F: Metal Physics
- Vol. 8 (3), 511-520
- https://doi.org/10.1088/0305-4608/8/3/020
Abstract
The pseudobinary compounds Er6(Fe1-xMnx)23 are ferrimagnetic with drastically changing Curie temperatures dependent upon the Fe-Mn concentration. The magnetisation against temperature curves are analysed in terms of a two-sublattice molecular field model. It is shown that the 3d-3d interaction is dominant for the magnitude of Tc. Following Clark and Callen the 3d-4f molecular field coefficient can be determined experimentally if at the compensation temperature (Tcomp) the magnetisation is only field-dependent and not temperature-dependent. For Er6Fe23 with Tcomp=105K good agreement is obtained between the calculated 3d-4f molecular field coefficient and its value determined from the field-dependent magnetisation at Tcomp.Keywords
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