Characterization of the magnetic correlations in Gd3Ga5O12
Gd3Ga5O12 is a geometrically frustrated compound and is one of the few compounds that does not order down to the lowest temperatures measured, 25 mK, despite antiferromagnetic dominant ex- change. Powder neutron diffraction revealed short range order, below 3 K, indicative of a spin glass or a cooperative paramagnet that nucleate around impurity centers below 140 mK leading to longer range contributions. Theoretical work suggested that the ground state is not caused by weak disorder but instead originates from the complex Hamiltonian in which competing small energy scales select the unusual ordering wavevector. In order to understand these small energy scales it is imperative to map a large area of S(Q). This proposal aims to do so using thin film single crystals on the hot neutron diffractometer D9, to minimise the absorption of the Gd isotope.
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DEEN Pascale Petronella; FERNANDEZ DIAZ Maria Teresa; Sonja Holm-Dahlin; Henrik Jacobsen; PETRENKO Oleg and YOUNG Olga. (2012). Characterization of the magnetic correlations in Gd3Ga5O12. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-42-272
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