Magnetoresistance investigation on single crystalline Ce3Pd20Si6 across the temperature-magnetic field phase diagram

International Conference on Strongly Correlated Electron Systems 2014

Martelli, Valentina^1 ; Julio Larrea, J.^1,2 ; Lorenzer, Karl-Anton^1 ; Hänel, Jonathan^1 ; Prokofiev, Andrey^1 ; Paschen, Silke^1

Institute of Solid State Physics, Vienna University of Technology, Vienna

1040, Austria^1

Physics Department, University of Johannesburg, PO Box 524, Auckland Park

2006, South Africa^2

关键词: Antiferromagnetic orderings;    Antiferroquadrupolar;    Cage compounds;    Cubic crystal structures;    Heavy fermion;    Single-crystalline;    Temperature-magnetic field phase diagram;    Tricritical point;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/592/1/012080/pdf
DOI  :  10.1088/1742-6596/592/1/012080

来源: IOP

【 摘 要 】

The heavy fermion cage compound Ce3Pd20Si6crystallizes in a cubic crystal structure with two inequivalent Ce sites. It undergoes two phase transitions at TQ= 0.5 K and TN= 0.31 K which are tentatively attributed, respectively, to antiferroquadrupolar and to antiferromagnetic order. Recent specific heat investigations on single crystals detected additional anomalies within the antiferroquadrupolar phase, for a magnetic field applied along the [100] direction, suggesting the presence of a tricritical point at around 2.3 T and 0.5 K. We performed isothermal magnetoresistivity investigations (down to 0.055 K) on single crystalline Ce3Pd20Si6across the B-T phase diagram to gain further insight on this new feature.