Bulletin of the American Physical Society
APS March Meeting 2011
Volume 56, Number 1
Monday–Friday, March 21–25, 2011; Dallas, Texas
Abstract: K1.00157 : Hysteresis in weak ferromagnets
Author:
Magnetic hysteresis is studied in the orthoferrites ErFeO3 and
TmFeO3 using the single crystal samples of millimeter dimensions.
It is shown that in both materials one observes a temperature
transition manifesting itself through the temperature hysteresis of
the magnetic moment and a peculiar temperature evolution of the
field hysteresis loop shapes near this transition. Experiments rule
out the hypothesis that the ordering of the orthoferrite's rare
earth magnetic moments plays an important role in these phenomena.
The hysteresis curves can be explained by a few-domain magnetic
state of the samples that results from the weak ferromagnetism of
the orthoferrites. The phenomenon is generic for weak ferromagnets
with temperature dependent magnetization. A large characteristic
magnetic length makes the behavior of the relatively big samples
analogous to that observed in the nano-size samples of strong
ferromagnets.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2011.MAR.K1.157
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