We have measured the electrical resistivity of clathrate Ce3Pd20Ge6 under high pressure up to 3.86 GPa in order to investigate pressure effects on two successive phase transitions: O02-type ferroquadrupole order on Ce-8c site at TQ = 1.2 K and antiferromagnetic order on Ce-4a site at TN = 0.75 K. With applying pressure, TQ stays nearly constant at low pressures and gradually decreases above 2 GPa, while TN first increases and then decreases above 2.5 GPa. From these results, critical pressures, where TN and TQ become 0, are roughly estimated to be around 5-6 GPa. In addition, we found that the magnetic resistivity, which is obtained by subtracting the resistivity of La3Pd20Ge6 from that of Ce3Pd20Ge6, exhibits -InT dependence in two different temperature ranges, suggesting presence of two different Kondo temperatures originated in the two crystallographic Ce-sites.
|Journal||Journal of Physics: Conference Series|
|Publication status||Published - 2012|
|Event||International Conference on Strongly Correlated Electron Systems, SCES 2011 - Cambridge, United Kingdom|
Duration: 2011 Aug 29 → 2011 Sept 3