Magnetic structure of UnRhIn3n+2 (n = 1, 2) compounds
Lanthanide compounds with the tetragonal HoCoGa5-type structure, often called 115, are extensively studied since the discovery of unconventional physical properties, like heavy fermion behavior, unconventional superconductivity and coexistence of magnetism and superconductivity in CeRhIn5, CeCoIn5 and CeIrIn5. With synthesize of Ce2RhIn8 and Ce2CoIn8 which crystallize in same structure type, this series was extended by an additional parameter 'dimensionality', i.e, from CeCoIn5 to Ce2CoIn8 the electronic structure is more 3D. Unconventional superconductivity has also been observed in PuRhIn5 and PuRhGa5, which widens the interest in the 115 series to the 5f electron compounds. Recently URhIn5 was synthesized which surprisingly orders antiferromagnetically (AFM) at high TN = 98K. We were able to grow U2RhIn8 for the first time. High quality single crystals with RRR of 500 were obtained from In-flux. The compound orders AFM at TN = 119K. We propose to determine the magnetic structure of U2RhIn8, to find out the magnetic moment on the Uranium and to follow the evolvement of the AFM state with temperature in order to comprehend the influence of 'dimensionality'.
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BARTHA Attila; CUSTERS Jeroen; KLICPERA Milan and OULADDIAF Bachir. (2015). Magnetic structure of UnRhIn3n+2 (n = 1, 2) compounds. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-41-808
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