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 |
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Publication: | Physical Review Leters |
Publisher: | The American Physical Society |
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.ac.in/id/eprint/18931 |
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