Investigation of the magnetic structure of Ce2Rh3Ge5 using neutron diffraction
The compound Ce2Rh3Ge5 was reported to form in the orthorhombic U2Co3Si5-type structure. A marked peak in the susceptibility and a sharp drop in the resistivity are observed at TN = 5.5 K indicating an antiferromagnetic ordering of the Ce moments. Isothermal magnetization curves at 1.3 K reveal a field induced metamagnetic transition at 23 T in Ce2Rh3Ge5. The saturation moment of 0.8µB/Ce is suggestive of the ¿7 doublet ground state. The specific heat exhibits a ¿-type anomaly around TN, while the value of magnetic entropy at TN is reduced to 50% of Rln2. The linear coefficient of specific heat is 148 mJ/K2 mol Ce above TN. Interestingly, application of rather weak pressure of Pc = 4.5kbar suppresses TN to zero temperature and reveals a pressure tuned quantum critical point, which is confirmed by our muon spin rotation measurements. In order to shed light on the pressure induced QCP the first step consists in the determination of the ambient pressure magnetic structure of Ce2Rh3Ge5.
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TRIPATHI Rajesh; D.T. Adroja; DAS Debarchan; LANGRIDGE Sean and RITTER Clemens. (2023). Investigation of the magnetic structure of Ce2Rh3Ge5 using neutron diffraction. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-31-2920
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