Magnetic properties of ulvöspinel

Details Magnetic properties of ulvöspinel Magnetic properties of ulvöspinel

Apr 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978pepi...16..196r&link_type=abstract

Physics of the Earth and Planetary Interiors, Volume 16, Issue 3, p. 196-199.

Physics

1

Scientific paper

Magnetisation measurements on ulvöspinel have shown that there is a transition from the weakly ferromagnetic state to an essentially antiferromagnetic one at T ~ 60-100 K when moderate measuring fields (24 kOe) are used. Cooling from above 100 K in the presence of a magnetic field of several kilooersteds produces a reversed remanence for T ≲ 40 K and the resulting thermomagnetic curve is Néel N-type. Magnetisation in 80 kOe produces a spontaneous moment extrapolated to 0 K of 0.015 μB, although this may not be completely saturated. An explanation for the magnetic transition is suggested in terms of an increased anisotropy possibly associated with a crystal transition.

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