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High magnetic field properties and ESR of the compounds |
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| Authors: | A-L Barra G Chouteau A Stepanov A Rougier C Delmas |
| Institution: | Grenoble High Magnetic Field Laboratory (Laboratoire conventionné avec l'Institut National Polytechnique, Grenoble, et l'Université Joseph-Fourier, Grenoble 1.), MPI - FKF and CNRS, B.P. 166, 38042 Grenoble Cedex 09, France, FR Laboratoire MATOP, Faculté Saint-Jér?me, C-151, Université Aix-Marseille III, 13397 Marseille Cedex 20, France, FR Institut de Chimie de la Matière Condensée de Bordeaux-ICMCB-CNRS, et école Nationale Supérieure de Chimie et Physique de Bordeaux, avenue Dr. A. Schweitzer, 33608 Pessac Cedex, France, FR |
| Abstract: | compounds have a layered structure made of alternating Ni-O and Li-O slabs. An amount z of extra divalent Ni ions is always present in the Li-O layers. We show, using high field magnetisation, static and dynamic susceptibility and high frequency ESR, that the magnetic properties are driven by the z parameter. The compounds can be described as ferromagnetic Ni-O layers, bridged by clusters possessing a net ferromagnetic moment. Received: 24 July 1998 / Revised and Accepted: 23 September 1998 |
| Keywords: | PACS 75 25 +z Spin arrangements in magnetically ordered materials (including neutron and spin-polarized electron studies synchrotron-source X-ray scattering etc ) - 75 30 Et Exchange and superexchange interactions - 76 50 +g Ferromagnetic antiferromagnetic and ferrimagnetic resonances spin-wave resonance |
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