Evidence of large nonlinear magnetic effects in the paramagnetic phase of GaFeO3
| Autor: | F. M. Vitucci, Paolo Calvani, Gisèle Gruener, Jean-Claude Soret |
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| Jazyk: | angličtina |
| Rok vydání: | 2011 |
| Předmět: |
Materials science
Condensed matter physics Field (physics) Resonance Atmospheric temperature range Condensed Matter Physics Magnetic susceptibility Electronic Optical and Magnetic Materials Condensed Matter::Materials Science Magnetization Paramagnetism Ferrimagnetism Condensed Matter::Strongly Correlated Electrons Spin (physics) human activities |
| Popis: | Magnetic susceptibility and magnetization measurements have been performed on a polycrystalline sample of GaFeO${}_{3}$ and compared with $X$-band electronic spin resonance (ESR) experiments. The persistence of nonlinear effects in the presence of relatively low external fields is observed far above the ferrimagnetic transition. The temperature evolution of the ESR spectra indicates the increase of spin-spin interactions accompanied by significant changes in the internal field as the nonlinear regime becomes more important. This suggests the existence of ferrimagnetic short-range spin correlations induced by the external field over a wide temperature range above the magnetic ordering transition. |
| Databáze: | OpenAIRE |
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