Restoration of Motionally Narrowed Hyperfine Splitting in Superparamagnetic Particles by Magnetic Field
- 1 February 1968
- journal article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 39 (2) , 997-998
- https://doi.org/10.1063/1.1656365
Abstract
Mössbauer absorption spectra of 57Fe in ultrafine powders of NiFe2O4 were taken in external magnetic fields from 0 to 20 kOe at room temperature. A transition from a spectrum with no hyperfine field, Hhpf, to a Zeeman split spectrum of Hhpf=500 kOe has been observed. Comparison of the results with magnetization measurements suggest that the drastic effect of the external field is due to the polarization of the superparamagnetic particles by the field.This publication has 4 references indexed in Scilit:
- Mössbauer Effect in Antiferromagnetic Fine ParticlesJournal of the Physics Society Japan, 1966
- Some Properties of Supported SmallParticles Determined with the Mössbauer EffectPhysical Review B, 1966
- Hyperfine Structure of the 14.4-keVRay ofin Hydrated Ferric Ammonium Sulfate as a Function of the Magnetization of the SaltPhysical Review Letters, 1965
- Observation of Superparamagnetism by the Mössbauer EffectJournal of Applied Physics, 1965