Electron spin resonance of CuGeO3: Opposite effect of Ni- and Zn- or Si-doping
1999; Elsevier BV; Volume: 259-261; Linguagem: Inglês
10.1016/s0921-4526(98)00793-5
ISSN1873-2135
AutoresB. Grenier, A.-L. Barra, P. Monod, S. Clément, Jean‐Pierre Renard, G. Dhalenne, A. Revcolevschi,
Tópico(s)ZnO doping and properties
ResumoWe have studied the effect of doping (up to 3%) with Ni, Zn and Si on the ESR spectra of CuGeO3. Our experiments were performed on single crystals at 9.5, 95 and 190 GHz, above and below the spin–Peierls transition. In contrast to Zn or Si-doping, which hardly affects the position of the resonance, the presence of Ni induces a large shift towards high fields of the ESR line. This shift is shown to be proportional to the ratio of Ni to Cu susceptibility: Hence it is strongly enhanced below the spin–Peierls transition.
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