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On the Verwey Transition in Magnetite

✍ Scribed by B. Lorenz; D. Ihle

Publisher
John Wiley and Sons
Year
1972
Tongue
English
Weight
252 KB
Volume
54
Category
Article
ISSN
0370-1972

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✦ Synopsis

Abstract

The Verwey transition in magnetite is investigated using a band model with interatomic Coulomb energy introduced by Cullen and Callen. This model is treated in the Hartree‐Fock approximation. A tight‐binding calculation of the band structure with Verwey ordering yields a gap in the single‐particle excitation spectrum for M = (U/2|h|) m > 1 (U Coulomb energy, h overlap integral, m ordering parameter). Below the Verwey temperature T~v~ semiconducting behaviour for M > 1 and a region of gapless Verwey ordering and semimetallic behaviour for 0 < M β©½ 1 is found.

πŸ“œ SIMILAR VOLUMES

Quantum State Model of the Verwey Transi
Quantum State Model of the Verwey Transition in Magnetite
✍ H. Kloor; J.M. Honig πŸ“‚ Article πŸ“… 1999 πŸ› Elsevier Science 🌐 English βš– 206 KB

Previous analyses of the Verwey transition in magnetite have been placed on a 5rm footing by a consistent analysis of the statistical properties of an array of quantum states associated with ferrous or ferric ions in octahedrally coordinated interstices of the spinel lattice. This collection is repr