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Prog. Theor. Phys. Vol. 58 No. 2 (1977) pp. 482-495

[ Full Text PDF : FREE ACCESS (1045K) ]

Polarization Screening Effect on the Charge Ordering in Magnetite

Hitose Nagara, Juichiro Hama and Tuto Nakamura

Department of Material Physics, Faculty of Engineering Science, Osaka University, Toyonaka 560

(Received March 12, 1977)

Abstract:

On the basis of the pure ionic model the charge ordering in magnetite is studied with due account of the wavevector-dependent polarization-screening effect. The Verwey ordering (Γ'25) is found to be unstable for the electronic polarizability of oxygens larger than [αe]c = 0.91A3, where the stablest charge-ordering pattern must be of X4 symmetry. It is also shown that one fourth of the total modes of the charge fluctuation are nearly degenerate at the critical polarizability [αe]c.


URL : http://ptp.ipap.jp/link?PTP/58/482/
DOI : 10.1143/PTP.58.482

[ Full Text PDF : FREE ACCESS (1045K) ] Citation:

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Citing Article(s) :

  1. Journal of the Physical Society of Japan 66 (1997) pp. 472-477 :
    Precise Mössbauer Parameters of the High Temperature Phase of Fe 3O 4
    Shin Nakamura, Ling Li, Midori Tanaka, Sakae Todo and Kiiti Siratori

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