Observation of Superparamagnetism by the Mössbauer Effect
作者： W. J. Schuele , S. Shtrikman , D. Treves
DOI: 10.1063/1.1714075
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摘要: Mossbauer spectra of 57Fe in ultrafine NiFe2O4 and CoFe2O4 powders were studied, as a function crystallite size temperature. The hyperfine field was found to collapse at temperature, lower then the Curie points which decreased with particle size. This is interpreted motional narrowing due onset superparamagnetism.
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