Superexchange and magnetic relaxation in novel Eu-DOPED C60 phases
| Autor: | D. Claves, Cl. Jeandey, Y. Ksari-Habiles, J.L. Oddou, Gérard Chouteau, A. Stepanov, Ph. Touzain |
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| Přispěvatelé: | Laboratoire des champs magnétiques intenses (LCMI-GHMFL), Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Electrochimie et de Physico-chimie des Matériaux et des Interfaces (LEPMI ), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National Polytechnique de Grenoble (INPG)-Institut de Chimie du CNRS (INC)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), DRFMC/SPSMS/MRS, Centre d'Etudes Nucléaires de Genoble, Laboratoire d'Electronique des Milieux Condensés, CNRS |
| Rok vydání: | 1997 |
| Předmět: |
[PHYS]Physics [physics]
Fullerene Condensed matter physics Chemistry Magnetism Relaxation (NMR) fullerenes chemistry.chemical_element General Chemistry Condensed Matter Physics Amorphous solid Ion Mossbauer Crystallography relaxation Ferromagnetism Superexchange magnetism [CHIM]Chemical Sciences General Materials Science Europium europium |
| Zdroj: | Journal of Physics and Chemistry of Solids Journal of Physics and Chemistry of Solids, 1997, 58 (11), pp.1771-1778 |
| ISSN: | 0022-3697 |
| DOI: | 10.1016/s0022-3697(97)00064-4 |
| Popis: | International audience; EuxC6o compounds have been synthesized using high temperature solid-solid reaction. For x = 3 and 6 new crystalline structures appear. Mossbauer experiments reveal the simultaneous presence of Eu2+ and Eu3+ ions. In Eu6C60, ferromagnetic Eu pairs form at 65 K through a superexchange mechanism via the bucky balls. Higher clusters form at lower temperatures. In Eu3C60, relaxation effects can be related with the presence of an amorphous state. |
| Databáze: | OpenAIRE |
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