{ "id": "cond-mat/9902010", "version": "v3", "published": "1999-02-01T11:49:08.000Z", "updated": "1999-03-22T12:02:36.000Z", "title": "Ising pyrochlore magnets: Low temperature properties, ice rules and beyond", "authors": [ "R. Siddharthan", "B. S. Shastry", "A. P. Ramirez", "A. Hayashi", "R. J. Cava", "S. Rosenkranz" ], "comment": "5 pages revtex, 4 figures; some revisions, additional data, additional co-authors and a changed title. Basic ideas of paper remain the same but those who downloaded the original version are requested to get this more complete version", "doi": "10.1103/PhysRevLett.83.1854", "categories": [ "cond-mat.stat-mech", "cond-mat.dis-nn" ], "abstract": "Pyrochlore magnets are candidates for 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 behaviours: (i) an ordered doubly degenerate state, (ii) a highly disordered state with a broad transition to paramagnetism, (iii) a partially ordered state with a sharp transition to paramagnetism. Thus these competing interactions can induce behaviour very different from conventional ``spin ice''. Closely corresponding behaviour is seen in the real compounds---in particular Ho2Ti2O7 corresponds to case (iii) which has not been discussed before, rather than (ii) as suggested earlier.", "revisions": [ { "version": "v3", "updated": "1999-03-22T12:02:36.000Z" } ], "analyses": { "keywords": [ "low temperature properties", "ising pyrochlore magnets", "ice rules", "short-ranged superexchange interactions", "spin-ice behavior" ], "tags": [ "journal article" ], "publication": { "publisher": "APS", "journal": "Phys. Rev. Lett." }, "note": { "typesetting": "RevTeX", "pages": 5, "language": "en", "license": "arXiv", "status": "editable" } } }