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Magnetic properties of the S = 1/2 one-dimensional antiferromagnet MgVO |
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| Authors: | J. Choukroun V.A. Pashchenko Y. Ksari J.Y. Henry F. Mila P. Millet P. Monod A. Stepanov J. Dumas R. Buder |
| Affiliation: | 1.Laboratoire MATOP, Université d'Aix-Marseille III and CNRS, Faculté des Sciences de Saint-Jér?me, C-151, 13397 Marseille Cedex 20, France,France;2.Grenoble High Magnetic Field Laboratory, MPI-FKF and CNRS, 38042 Grenoble Cedex 9, France,France;3.CEA Grenoble, Département de Recherche Fondamentale sur la Matière Condensée, 38054 Grenoble Cedex 9, France,France;4.Laboratoire de Physique Quantique, Université Paul Sabatier and CNRS, 118 route de Narbonne, 31062 Toulouse, France,France;5.Centre d'élaboration de Matériaux et d'études Structurales, CNRS, BP 4347, 29 rue J. Marvig, 31055 ToulouseCedex 4, France,France;6.Laboratoire de Physique de la Matière Condensée, ENS, 24 rue Lhomond, 75231 Paris Cedex 5, France,France;7.Laboratoire d'études des Propriétés électroniques des Solides, CNRS, 38042 Grenoble Cedex 9, France,France |
| Abstract: | The magnetic susceptibility and the electron spin resonance in the X-band of the transition metal oxide compound MgVO3 are reported. We show that this compound, made of weakly coupled infinite chains of VO5 pyramids, behaves as a S =1/2 one-dimensional Heisenberg antiferromagnet. From the ESR and magnetic experiments we deduce the Néel temperature K, the in-chain coupling constant K and the g-factor values g x = g z =1.972(2), g y =1.946(1) for V4+ ions in MgVO3. Received 14 July 1999 |
| Keywords: | PACS. 75.30.Et Exchange and superexchange interactions - 75.30.Cr Saturation moments and magnetic susceptibilities - 75.40.-s Critical-point effects specific heats short-range order |
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