Band theoretical investigation of the Curie temperatures of modified R{sub 2}Fe{sub 17}-based intermetallic compounds

Journal Article · Mon Apr 01 04:00:00 EST 1996 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.361874· OSTI ID:280001

Ching, W Y; Huang, M ^[1]

---

1. 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--
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 8 Vol. 79; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ADDITIONS
BAND THEORY
CARBON ADDITIONS
CURIE POINT
ELECTRONIC STRUCTURE
GALLIUM ADDITIONS
INTERMETALLIC COMPOUNDS
IRON COMPOUNDS
LCAO METHOD
MAGNETIC MATERIALS
NITROGEN ADDITIONS
RARE EARTH COMPOUNDS
SILICON ADDITIONS