Analog to the 4He melting curve in a model geometrically frustrated magnet

Y. K. Tsui, J. Snyder, P. Schiffer

Research output: Contribution to journalArticlepeer-review

Abstract

Gadolinium gallium garnet, Gd3Ga5O12 (GGG) has an extraordinary low-temperature phase diagram. Although the Curie-Weiss temperature of GGG is ∼-2 K, GGG shows no long-range order down to T ∼ 0.4 K. At low temperatures GGG has a spin-glass phase at low fields (≲0.08 T), a field-induced long-range-ordered anti-ferromagnetic (AFM) phase at fields of between 0.7 and 1.3 T, and, at intermediate fields, an apparent spin-liquid (SL) phase without long-range order. We have performed specific heat, magnetocaloric, and static magnetization measurements near the SL/AFM phase boundary. Our results show that the lower field boundary of the AFM phase has a distinct minimum at T ∼ 0.2 K, in analogy to the minimum in the melting curve of 4He.

Original languageEnglish (US)
Pages (from-to)1439-1446
Number of pages8
JournalCanadian Journal of Physics
Volume79
Issue number11-12
DOIs
StatePublished - Jan 1 2001

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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