Multiple field-induced phase transitions in the geometrically frustrated dipolar magnet: $Gd{_2}Ti{_2}O{_7}$

Ramirez, AP and Shastry, BS and Hayashi, A and Krajewski, JJ and Huse, DA and Cava, RJ (2002) Multiple field-induced phase transitions in the geometrically frustrated dipolar magnet: $Gd{_2}Ti{_2}O{_7}$. In: Physical Review Leters, 89 . 067202 - 067206.

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Abstract

Field-driven phase transitions generally arise from competition between Zeeman energy and exchange or crystal-field anisotropy. Here we present the phase diagram of a frustrated pyrochlore magnet Gd2Ti2O7, where crystal-field splitting is small compared to the dipolar energy. We find good agreement between zero-temperature critical fields and those obtained from a mean-field model. Here, dipolar interactions couple real space and spin space, so the transitions in Gd2Ti2O7 arise from field-induced "cooperative anisotropy," reflecting the broken spatial symmetries of the pyrochlore lattice.

Item Type:	Journal Article
Additional Information:	Copyright of this article belongs to The American Physical Society.
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	23 Nov 2009 09:02
Last Modified:	19 Sep 2010 05:26
URI:	http://eprints.iisc.ernet.in/id/eprint/18931

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