Investigation of the exotic low temperature ground state of the S_eff=1/2 pyrochlore antiferromagnet Ce2Sn2O7 - continuation
We have recently pointed out the existence of a novel exotic magnetic state developing at subKelvin temperatures in the Ce3+ pyrochlore stannate. The spin system of this compound is characterized by a thermally isolated mJ=3/2 Kramers' doublet at low temperature, providing effective spin 1/2 moments on a pyrochlore lattice. These spins are characterized by a strong Ising <111> anisotropy and the material does not order down to the lowest investigated temperature (0.02 K). However, Ce2Sn2O7 develops a correlated regime for temperatures below 1 K, as evidenced by a drop of the effective magnetic moment. In a previous experiment on D7 we have used XYZ polarization analysis in order to look for magnetic correlations at low temperatures but we did not find anything. Here, we really want a basic magnetic signal from Ce2Sn2O7 by comparing different temperatures in the paramagnetic regime. Ce2Sn2O7 is a very intriguing compound and so far we have the only sample and no magnetic signal from the groundstate doublet, so we need to define where one does exist and where it vanishes.
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Romain Sibille; FENNELL Tom; KENZELMANN Michel; LHOTEL Elsa and WILDES Andrew. (2016). Investigation of the exotic low temperature ground state of the S_eff=1/2 pyrochlore antiferromagnet Ce2Sn2O7 - continuation. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-32-834
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