Ising pyrochlore magnets: Low-temperature properties, “ice rules,” and beyond

R. Siddharthan, B. S. Shastry, A. P. Ramirez, A. Hayashi, R. J. Cava, S. Rosenkranz

Research output: Contribution to journalArticle

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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.

Original languageEnglish (US)
Pages (from-to)1854-1857
Number of pages4
JournalPhysical review letters
Volume83
Issue number9
DOIs
StatePublished - Jan 1 1999

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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    Siddharthan, R., Shastry, B. S., Ramirez, A. P., Hayashi, A., Cava, R. J., & Rosenkranz, S. (1999). Ising pyrochlore magnets: Low-temperature properties, “ice rules,” and beyond. Physical review letters, 83(9), 1854-1857. https://doi.org/10.1103/PhysRevLett.83.1854