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Magnetic Interactions in Co 3 O 4
Author(s) -
Scheerlinck D.,
Hautecler S.
Publication year - 1976
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.2220730120
Subject(s) - antiferromagnetism , spinel , paramagnetism , crystallite , magnetic moment , ion , condensed matter physics , physics , exchange interaction , energy (signal processing) , magnetization , moment (physics) , chemistry , atomic physics , crystallography , materials science , magnetic field , ferromagnetism , quantum mechanics , metallurgy
Co 3 O 4 is a normal spinel with only A‐A interactions which becomes antiferromagnetic at T N ≈ 40 K. The exchange integrals between one ion and its first and second neighbours are derived from the second moment of energy distributions of neutrons scattered by a polycrystalline sample in its paramagnetic state (155 K) and from a Green's function analysis of T N . The result, J 1 /k B = −(7.27 ± 0.25) K and |J 2 |/k B < 0.3 K, indicates that the interaction with the nearest neighbours is by far dominant.