Peculiar Ferrimagnetism Associated with Charge Order in Layered Perovskite GdBaMn2O5

Details Peculiar Ferrimagnetism Associated with Charge Order in Layered Perovskite GdBaMn2O5 Peculiar Ferrimagnetism Associated with Charge Order in Layered Perovskite GdBaMn2O5

2007-06-06

arxiv.org/abs/0706.0749v1

Phys. Rev. Lett. 98, 207201 (2007)

Physics

Condensed Matter

Materials Science

4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.98.207201

The magnetic properties of GdBaMn_{2}O_{5.0}, which exhibits charge ordering, are studied from 2 to 400 K using single crystals. In a small magnetic field applied along the easy axis, the magnetization M shows a temperature-induced reversal which is sometimes found in ferrimagnets. In a large magnetic field, on the other hand, a sharp change in the slope of M(T) coming from an unusual turnabout of the magnetization of the Mn sublattices is observed. Those observations are essentially explained by a molecular field theory which highlights the role of delicate magnetic interactions between Gd^{3+} ions and the antiferromagnetically coupled Mn^{2+}/Mn^{3+} sublattices.

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