Paramagnetic defects in α-WxV2O5 |
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Authors: | Jacques Livage Chakib RKha Dominique Ballutaud Jean-Claude Grenet |
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Institution: | Spectrochimie du Solide, ERA 387, Université Paris VI, 4, place Jussieu, Paris 5e, France;Chimie Appliquée, Bâtiment 414, Université Paris XI, 91405 Orsay, France |
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Abstract: | Paramagnetic defects in α-WxV2O5 have been studied by ESR. A model is proposed where the unpaired electron arising from a valence induction effect remains localized on a single vanadium ion near the W6+ along the b direction. Introducing W6+ leads to a lattice distortion which is more important than that in the case of Mo6+. A slight displacement of vanadium along the a direction is observed in the defect, V4+ showing a stronger tendency toward octahedral coordination than V5+. |
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