Superparamagnetism in submicroscopic α-FeOOH particles observed by the Mössbauer effect
van der Kraan, A. M.;van Loef, J. J.;van der Kraan, A. M.;van Loef, J. J.;
phl1970Vol. 20pp. 614-616
196
m.1970phlsuperparamagnetism
Abstract
Mössbauer hyperfine spectra of ultrafine α-FeOOH particles measured at 77°K and 295°K show drastic changes such that the hyperfine field decreases before its collapse with decreasing particle size. These observations are similar to those obtained in superparamagnetic α Fe 2O 3.