Determination of low temperature spin correlations of terbium gallium garnet(Tb3Ga5O12).
Magnetic frustration preventing the simultaneous satisfaction of all magnetic interactions in a system is well known as a contributor to unconventional behavior in spin systems. Rare-earth garnet lattices, formed of two interpenetrating half-garnet lattices, which form a twisting 3d arrangement of corner sharing triangles, are promising model systems for investigation of the effects of magnetic frustration. Terbium gallium garnet (TGG/Tb3Ga5O12) is well known as an advanced material - due to its high Verdet constant it is used as a Faraday rotator for optical applications - but its low temperature magnetism has been relatively little studied. TGG is known to undergo a transition to an antiferromagnetic phase at TN=0.35 K, but the relatively large Curie-Weiss temperature (-8.6 K) strongly implies the existence of a correlated but disordered regime for TN<T<8.6 K, which has never been investigated experimentally. We propose to use D7 to search for a correlated spin liquid phase just above the ordering temperature TN, and to gain a good understanding of its spin correlations.
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WAWRZYNCZAK Rafal; BOEHM Martin; FENNELL Tom; KENZELMANN Michel; NILSEN Goran and WILDES Andrew. (2016). Determination of low temperature spin correlations of terbium gallium garnet(Tb3Ga5O12).. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-42-418
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