Analog to the 4He melting curve in a model geometrically frustrated magnet
作者： Y K Tsui , J Snyder , P Schiffer
DOI: 10.1139/P01-087
关键词: AFm phase 、 Phase diagram 、 Physics 、 Gadolinium gallium garnet 、 Phase (matter) 、 Condensed matter physics 、 Magnet 、 Magnetic refrigeration 、 Melting curve analysis 、 Magnetization
摘要: Gadolinium gallium garnet, Gd3Ga5O12 (GGG) has an extraordinary low-temperature phase diagram. Although the CurieWeiss temperature of GGG is ~2 K, shows no long-range order down to T ~ 0.4 K. At low temperatures a spin-glass at fields ( 0.08 T), field-induced long-range-ordered anti-ferromagnetic (AFM) between 0.7 and 1.3 T, and, intermediate fields, apparent spin-liquid (SL) without order. We have performed specific heat, magnetocaloric, static magnetization measurements near SL/AFM boundary. Our results show that lower field boundary AFM distinct minimum 0.2 in analogy melting curve 4He. PACS Nos.: 75.30Kz, 75.50Ee
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