Siddharthan, R and Shastry, BS and Ramirez, AP and Hayashi, A and Cava, RJ and Rosenkranz, S (1999) Ising pyrochlore magnets: Low-temperature properties, "ice rules," and beyond. In: Physical Review Letters, 83 (9). pp. 1854-1857.
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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. Ey 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:||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 Jun 2011 07:22|
|Last Modified:||23 Jun 2011 07:22|
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