Spin Ice

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dc.creatorGingras, Michel J. P.
dc.date2009-03-16
dc.date.accessioned2026-07-07T12:52:53Z
dc.date.available2026-07-07T12:52:53Z
dc.descriptionGeometric frustration usually arises in systems that comprise magnetic moments (spins) which reside on the sites of a lattice made up of elementary triangular or tetrahedral units and which interact via antiferromagnetic nearest-neighbor exchange. Albeit much less common, geometric frustration can also arise in systems with strong non-collinear single-ion easy-axis (Ising-like) anisotropy and ferromagnetically} coupled spins. This is what happens in some pyrochlore oxide materials where Ising-like magnetic rare earth moments (Ho$^{3+}$, Dy$^{3+}$) sit on a lattice of corner-shared tetrahedra and are coupled via effectively ferromagnetic (dipolar) interactions. These systems possess a macroscopic number of quasi-degenerate classical ground states and display an extensive low-temperature entropy closely related to the extensive proton disorder entropy in common water ice. For this reason, these magnetic systems are called {\it spin ice}. This chapter reviews the essential ingredients of spin ice phenomenology in magnetic pyrochlore oxides.
dc.description33 pages, 6 figures. Lecture notes for Trieste Summer School, August 2007. To appear as a chapter in "Highly Frustrated Magnetism", Eds. C. Lacroix, P. Mendels, F. Mila
dc.identifierhttps://arxiv.org/abs/0903.2772
dc.identifierhttp://arxiv.org/abs/0903.2772
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/223444
dc.subjectStatistical Mechanics
dc.subjectOther Condensed Matter
dc.titleSpin Ice
dc.typetext

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