Europhys. Lett, 36 (6), pp. 455-460 (1996)
Antiferromagnetic domains and the spin-flop transition of
G. P. Felcher and R. Kleb
Argonne National Laboratory - Argonne, IL 60439, USA
(received 29 August 1996; accepted 4 October 1996)
PACS. 75.25 - Spin arrangements in magnetically ordered materials
(including neutron and spin-polarized electron studies,
synchrotron-source X-ray scattering, etc.).
PACS. 75.30Kz - Magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.).
PACS. 75.60 - Domain effects, magnetization curves, and hysteresis.
Abstract:In antiferromagnetic the magnetic moments of manganese are aligned along the tetragonal axis of the rutile structure. In a magnetic field along that axis (9.27 T at 4.2 K) the antiferromagnetic moments flop in the basal plane. Polarized neutron diffraction measurements showed that at about the entire crystal becomes aligned in a single antiferromagnetic domain, which persists even after the field is suppressed. The effect is due to a minute misalignment (a fraction of degree) of the applied field with the tetragonal axis of the crystal. The ensuing breakdown of symmetry at the spin-flop transition provides a way to control domains in this type of antiferromagnet.
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