Observation of Superparamagnetism by the Mössbauer Effect
- 1 March 1965
- journal article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 36 (3), 1010-1011
- https://doi.org/10.1063/1.1714075
Abstract
Mossbauer spectra of 57Fe in ultrafine NiFe2O4 and CoFe2O4 powders were studied, as a function of crystallite size and temperature. The hyperfine field was found to collapse at a temperature, lower then the Curie points which decreased with particle size. This collapse of the hyperfine field is interpreted as motional narrowing due to the onset of superparamagnetism.Keywords
This publication has 6 references indexed in Scilit:
- Inexpensive Automatic Recording Mössbauer SpectrometerReview of Scientific Instruments, 1964
- Magnetic hyperfine interactions and relaxation phenomena in paramagnetic Dy2O3Physics Letters, 1964
- Mössbauer effect hyperfine structure of trivalent Fe57 in corundumPhysics Letters, 1964
- Nuclear Magnetic Resonance in MnNear the Critical PointPhysical Review Letters, 1962
- Preparation, Growth, and Study of Ultrafine Ferrite ParticlesJournal of Applied Physics, 1961
- Line-breadths and the theory of magnetismIl Nuovo Cimento (1869-1876), 1957