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Linear Magnetic Birefringence in Transition Metal Oxides: CoO
Author(s) -
Germann K. H.,
Maier K.,
Strauss E.
Publication year - 1974
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.2220610209
Subject(s) - antiferromagnetism , condensed matter physics , birefringence , perpendicular , tetragonal crystal system , materials science , cobalt , optics , crystallography , chemistry , physics , crystal structure , geometry , metallurgy , mathematics
The optical linear magnetic birefringence (LMB) of cobalt oxide single crystals was determined as a function of temperature near the antiferromagnetic Néel point. The measurements were taken from single‐domain crystals with the tetragonal c ‐axis oriented parallel or perpendicular to the direction of the light beam. Below T N the change of LMB with temperature in perpendicular arrangement is found to be proportional to the c ‐axis contraction and to the square of the long‐range order parameter. Magnetic short‐range order effects have been observed even far above T N . The results are discussed by means of a magnetostriction model.