Mössbauer Effect in Antiferromagnetic Fine Particles
作者： Teruya Shinjo
DOI: 10.1143/JPSJ.21.917
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摘要: Mossbauer measurements were made on fine particles of antiferromagnetic α-FeOOH with various particle sizes to examine the spectra in fluctuating fields produced by relaxation electron spins. In ultra samples, collapse internal field due superparamagnetism was observed. The critical volume at 294°K found be 3×10 -17 cm 3 and temperature for sample 1×10 210°K. effective anisotropy constant estimated order 10 4 erg/cm . transitional patterns from ordinary magnetic splitting (6-line) superparamagnetic doublet are discussed assignment is attempted comparison Blume's prediction.
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