Magnetic structure of the non-centrosymmetric heavy-fermion compound CePdSi3
There has been considerable recent interest in non-centrosymmetric heavy fermion superconductors which have been reported to exhibit unconventional behaviour, where the pairing wavefunctions are a mixture of singlet and triplet states. For example, at ambient pressure CeRhSi3 and CeIrSi3 show antiferromagnetic (AFM) ordering at 1.5 K and 5 K, respectively and exhibit superconductivity at 0.45-1.1 K and at 0.5-1.6 K, respectively, when subjected to an applied pressure. We propose to investigate the magnetic structure of the isostructural compound CePdSi3 on D20. This exhibits two AFM transitions at 5.2 K and 3 K. We will measure the magnetic structure, moment size, moment direction and the temperature dependence of the order parameter from 1.5 K to 7 K. We will compare these results to those predicted from fitting a crystalline electric field model to inelastic neutron scattering data. This will allow us to explore the changes in magnetic behaviour across the CeTSi3 system and help to understand the role of magnetism in the superconductivity of these compounds.
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SMIDMAN Michael; D.T. Adroja; BALAKRISHNAN Geetha; Adrian D Hillier; PAUL Donald Mckenzie and RITTER Clemens. (2013). Magnetic structure of the non-centrosymmetric heavy-fermion compound CePdSi3. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-31-2283
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