Ising pyrochlore magnets: low-temperature properties, "ice rules," and beyond

Siddharthan, R. ; Shastry, B. S. ; Ramirez, A. P. ; Hayashi, A. (1999) Ising pyrochlore magnets: low-temperature properties, "ice rules," and beyond Physical Review Letters, 83 (9). pp. 1854-1857. ISSN 0031-9007

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Official URL: http://prl.aps.org/abstract/PRL/v83/i9/p1854_1

Related URL: http://dx.doi.org/10.1103/PhysRevLett.83.1854

Abstract

Pyrochlore magnets are candidates for what Harris et al. [Phys. Rev. Lett. 79, 2554 (1997)] call "spin-ice" behavior. We present theoretical simulations of relevance for the pyrochlore family R2Ti2O7 ( R = rare earth ) supported by magnetothermal measurements on selected systems. By considering long-ranged dipole-dipole as well as short-ranged superexchange interactions, we get three distinct behaviors: (i) an ordered doubly degenerate state, (ii) a highly disordered state with a broad transition to paramagnetism, and (iii) a partially ordered state with a sharp transition to paramagnetism. Closely corresponding behavior is seen in the real compounds.

Item Type:Article
Source:Copyright of this article belongs to The American Physical Society.
ID Code:51259
Deposited On:28 Jul 2011 07:19
Last Modified:18 May 2016 05:17

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