57Fe NMR study of multiferroic BiFeO3 |
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| Authors: | V. S. Pokatilov and A. S. Sigov |
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| Affiliation: | (1) Kuban State University, Krasnodar, Russia;(2) Managing Company RusGazInzhiniring, Podolsk, Russia;(3) Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, Russia; |
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| Abstract: | The effects of the 57Fe isotope content and high-frequency magnetic field amplitude h 1 on the shape of the NMR spectrum of multiferroic BiFeO3 at T = 4.2 K are studied by pulsed nuclear magnetic resonance. The NMR spectrum shape and transverse relaxation time T 2 are found to depend strongly on the 57Fe isotope content and h 1 in multiferroic BiFeO3 in the presence of a spatial spin-modulated structure of a cycloid type. In a sample with a high 57Fe isotope content, the Suhl-Nakamura interaction contributes substantially to T 2. When these dynamic effects are taken into account for analysis of the NMR spectrum shape, an undisturbed (without an anharmonicity effect) spatial spin-modulated structure of a cycloid type is shown to exist in BiFeO3. |
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