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Self‐consistent Calculation of the Verwey Ordering in Magnetite
Author(s) -
Ihle D.,
Lorenz B.
Publication year - 1973
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220580107
Subject(s) - charge ordering , magnetite , condensed matter physics , coulomb , phase (matter) , order (exchange) , charge (physics) , physics , materials science , quantum mechanics , electron , finance , economics , metallurgy
Using the Cullen‐Callen model of magnetite in the Hartree approximation the Verwey order parameter m ( T )is calculated self‐consistently for U /| h | > 2.78 ( U Coulomb energy, h overlap integral). Verwey ordering and semiconducting behaviour is obtained for 0 ≦ T < T g and gapless Verwey ordering and semimetallic behaviour for T g ≦ T < T 0 At T 0 a second‐order phase transition to the disordered metallic phase takes place.
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