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# Magnetic correlations in paramagnetic iron

journal contribution

posted on 2006-06-29, 11:10 authored by John SamsonA method is described for calculating the extent of short-range order
(SRO) in the paramagnetic state of magnetic transition metals. An energy V is
calculated for a set of configurations of the exchange field. An entropy S is attached
to each configuration; this is the logarithm of the number of configurations with the
same degree of long- and short-range magnetic order. The SRO is then found by
minimizing the resulting free energy V-TS with respect to a near-neighbour
correlation. The resulting Curie temperature Tc and the magnetic entropy are in good
agreement with experiment. The corresponding nearest neighbour correlation is
small (approximately cos 74°) at Tc.

## History

## School

- Science

## Department

- Physics

## Pages

1049511 bytes## Citation

SAMSON (1989), Magnetic correlations in paramagnetic iron. Journal of Physics: Condensed Matter, 1(37), pp 6717-6729## Publisher

© Institute of Physics## Publication date

1989## Notes

This article was published in the journal, Journal of Physics: Condensed Matter [© Intsitute of Physics] and is also available at: http://www.iop.org/EJ/journal/JPhysCM.## ISSN

0953-8984## Language

- en