Elementary formulation of the verwey transition in magnetite via the order-disorder formalism
作者： J.M. Honig , J. Spaŀek
DOI: 10.1016/S0022-4596(05)80303-2
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摘要: A review of experimental data relating to the Verwey transformation in Fe 3(1−δ) O 4 and 3− x Zn is presented. The transition from first order higher with increasing δ or rationalized by representing host crystal terms octahedral site pairs that share electrons between two sites. individual interstices can remain unoccupied become occupied localized itinerant electrons. application order-disorder formalism leads construction a free energy expression which must be optimized. If resulting relations are simplified adopting parameters associated several limiting cases, one automatically obtains model Strassler Kittel. This theory had previously been demonstrated very useful rationalizing both thermodynamic transport properties magnetite.
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