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Magnetic Interactions in α‐MnSeO 4 , α‐FeSO 4 , and β‐FeSO 4
Author(s) -
Wegener W.,
Hautecler S.,
Legrand E.,
Will G.
Publication year - 1980
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.2221000228
Subject(s) - paramagnetism , stability (learning theory) , energy (signal processing) , analytical chemistry (journal) , chemistry , physics , materials science , condensed matter physics , chromatography , quantum mechanics , computer science , machine learning
The energy distributions of neutrons scattered by α‐MnSeO 4 , α‐FeSO 4 , and β‐FeSO 4 in their paramagnetic state are measured by means of a time‐of‐flight technique. The values of two exchange parameters can be estimated from a simultaneous analysis of the second moment of these energy distributions and of the Néel temperature computed in the Green's function approximation. Various two‐parameter analyses are performed and checked by comparing calculated and experimental values for θ and χ( T N ). For α‐FeSO 4 the dominant interactions occur between the first and second neighbours. For β‐FeSO 4 two‐parameter analyses do not lead to a satisfactory description of all data; however, one can conclude that the interactions between third neighbours are important, in agreement with the stability conditions for the observed spin configuration.