Magnetic structure of V/sub 2/O/sub 3/ in the insulating phase

Journal Article · Wed Nov 01 00:00:00 EST 1978 · Phys. Rev., B: Solid State; (United States)

DOI:https://doi.org/10.1103/PhysRevB.18.4945· OSTI ID:6480125

Castellani, C; Natoli, C R; Ranninger, J

A phase diagram for all the possible collinear spin arrangements for V/sub 2/O/sub 3/ is derived within the atomic limit. Due to the fact that the a/sub 1g/ electrons of the V atoms form a diamagnetic bond for the vertical pairs of V atoms, the magnetic structure of V/sub 2/O/sub 3/ can be considered to be essentially determined by the remaining one electron per V atom in a twofold degenerate e/sub g/ level. Depending on only two parameters: t/sup 11//sub i/j/t/sup 22//sub i/j, the ratio of the hopping integrals within the two orbital states 1 and 2 and between a certain pair (i, j) of V atoms in the basal plane, and J/U, the ratio of the exchange constant to Hubbard's U, the regions of stability for a particular magnetic and orbital order are determined. The experimentally observed magnetic order falls into a region of values of these parameters which are expected for V/sub 2/O/sub 3/.

• Research Organization: Groupe des Transitions de Phases, Centre National de la Recherche Scientifique, Boite Postale 166, 38042 Grenoble, France
• OSTI ID: 6480125
• Journal Information: Phys. Rev., B: Solid State; (United States), Vol. 18:9
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
VANADIUM OXIDES
ELECTRICAL INSULATORS
PHASE DIAGRAMS
ELECTRIC CONDUCTIVITY
MAGNETIC PROPERTIES
METALS
SPIN ORIENTATION
CHALCOGENIDES
DIAGRAMS
ELECTRICAL EQUIPMENT
ELECTRICAL PROPERTIES
ELEMENTS
EQUIPMENT
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OXIDES
OXYGEN COMPOUNDS
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TRANSITION ELEMENT COMPOUNDS
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360204* - Ceramics
Cermets
& Refractories- Physical Properties