Band theoretical investigation of the Curie temperatures of modified R{sub 2}Fe{sub 17}-based intermetallic compounds
- Department of Physics, University of Missouri--Kansas City, Kansas City, Missouri 64110 (United States)
The Curie temperatures of several Nd{sub 2}Fe{sub 17}-based intermetallic compounds are calculated based on the spin-fluctuation model of Mohn and Wohlfarth and the band structure results calculated using the self-consistent orthogonalized linear combinations of the atomic orbitals method in the local spin density approximation. It is shown that the calculated {ital T}{sub {ital c}} can qualitatively account for the observed {ital T}{sub {ital c}} enhancement in this class of modified compounds by interstitial doping of N or C, or by elemental substitution of Fe by Si, Al or Ga. A simple explanation of {ital T}{sub {ital c}} enhancement based purely on the magnetovolume effect is not justified. It is also shown that neither the Stoner{endash}Curie temperature nor the characteristic spin-fluctuation temperature is adequate to explain the experimentally observed {ital T}{sub {ital c}} enhancement in these compounds. {copyright} {ital 1996 American Institute of Physics.}
- OSTI ID:
- 280001
- Report Number(s):
- CONF-951101-; ISSN 0021-8979; TRN: 9608M0052
- Journal Information:
- Journal of Applied Physics, Vol. 79, Issue 8; Conference: 40. conference on magnetism and magnetic materials, Philadelphia, PA (United States), 6-9 Nov 1995; Other Information: PBD: Apr 1996
- Country of Publication:
- United States
- Language:
- English
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