Multiple field-inducedphase transitions in the geometrically frustrated dipolar magnet: Gd2Ti2O7

Ramirez, A. P. ; Shastry, B. S. ; Hayashi, A. ; Krajewski, J. J. ; Huse, D. A. ; Cava, R. J. (2002) Multiple field-inducedphase transitions in the geometrically frustrated dipolar magnet: Gd2Ti2O7 Physical Review Letters, 89 (6). 067202_1-067202_4. ISSN 0031-9007

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Official URL: http://prl.aps.org/abstract/PRL/v89/i6/e067202

Related URL: http://dx.doi.org/10.1103/PhysRevLett.89.067202

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:Article
Source:Copyright of this article belongs to The American Physical Society.
ID Code:50789
Deposited On:26 Jul 2011 12:37
Last Modified:18 May 2016 04:57

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