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- W2018170434 abstract "Some solid solutions are investigated with the help of a two-sublattice model proposed by Neel in ferromagnetism. We suppose, like Kittel, that the F-AF transition occurs when the interlattice coefficient of molecular field W ab changes sign. The high-temperature transition is F P or AF P according to the sign of ν = dW ab dT . Under hydrostatic compression the transition is F → AF in agreement with the negative sign of η = dW ab dp . In each case, the molecular field coefficient of each sublattice W aa is much more important than W ab . On étudie quelques solutions solides à l'aide d'un modèle à deux sous-réseaux, proposé par Neel en ferromagnétisme. On admet, suivant Kittel, que la transition F-AF se produit lorsque le coefficient de champ moléculaire inter-réseau change de signe. La transition haute température est F P ou AF P suivant le signe de ν = dW ab dT . Sous l'action d'une compression hydrostatique la transition est F → AF par suite du signe négatif de η = dW ab dp . Dans tous les cas le coefficient de chaque sous-réseau W aa est beaucoup plus grand que W ab ." @default.
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- W2018170434 date "1976-01-01" @default.
- W2018170434 modified "2023-09-24" @default.
- W2018170434 title "Transition de phase ferroelectrique-antiferroelectrique par inversion de l'energie d'echange" @default.
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- W2018170434 doi "https://doi.org/10.1016/0022-4596(76)90038-4" @default.
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