Itinerant metamagnetism in rare earth-transition metal compounds
Intermetallic compounds of rare-earth and transition metals present the possibility of using the large magnetic moment of the first with the high Curie temperature of the second. We first discuss the nature of the coupling between the spin of the rare-earth and transition metal. We assume that it happens within the d band coming from the 5d and 3d levels and describe it using the Van Vleck model for ferromagnetism. We then consider the particular case of Cobalt compounds where Cobalt can be magnetic or not depending of the rare-earth metal. We describe the appearance of magnetism as a collective metamagnetism due to the position of the Fermi level in these compounds in a steep decrease of the density of states. Calculation of the density of states confirms this hypothesis.
- Research Organization:
- Laboratoire Louis Neel, CNRS, 166X, 38042 Grenoble Cedex, France
- OSTI ID:
- 6341645
- Journal Information:
- J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 50:B3; ISSN JAPIA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360102* -- Metals & Alloys-- Structure & Phase Studies
ALLOYS
COBALT ALLOYS
CURIE POINT
D STATES
ELECTRONIC STRUCTURE
ENERGY LEVELS
FERMI LEVEL
FERRIMAGNETISM
FERROMAGNETISM
INTERMETALLIC COMPOUNDS
IRON ALLOYS
MAGNETIC MOMENTS
MAGNETIC PROPERTIES
MAGNETISM
MAGNETIZATION
NICKEL ALLOYS
PHYSICAL PROPERTIES
RARE EARTH ALLOYS
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE