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Spin Fluctuations in a Magnetically Ordered Cr 2 O 3 –Fe 2 O 3 System
Author(s) -
Srivastava J. K.,
Sharma R. P.
Publication year - 1969
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.19690350151
Subject(s) - hyperfine structure , atmospheric temperature range , spin (aerodynamics) , condensed matter physics , field (mathematics) , relaxation (psychology) , ground state , spectral line , range (aeronautics) , chemistry , materials science , physics , atomic physics , thermodynamics , mathematics , psychology , social psychology , pure mathematics , composite material , astronomy
The study of Mössbauer spectra of the solid solution 0.905 Cr 2 O 3 —0.035 Fe 2 O 3 at different temperatures in the range 10 to 293 °K has revealed spin relaxation effects in this antiferromagnetically ordered system in a wide temperature range (100 to 289 °K) below the Néel temperature (289 °K). The variation of the hyperfine field with temperature is found to be almost linear from 10 °K onward. Above 100 °K the hyperfine field calculated from the total splitting is more than that obtained from ground state splitting. The observed results are compared with the existing spin‐flip theory based on a stochastic model.