Phase diagram of CeRh2Si2 under pressure studied by thermopower measurements

International Conference on Strongly Correlated Electron Systems 2014

Palacio-Morales, A.^1,2 ; Pourret, A.^1,2 ; Knebel, G.^1,2 ; Aoki, D.^1,2,3 ; Braithwaite, D.^1,2 ; Flouquet, J.^1,2

University Grenoble Alpes, INAC-SPSMS, Grenoble

F-38000, France^1

CEA, INAC-SPSMS, Grenoble

F-38000, France^2

IMR-Tohoku University, Oarai, Japan^3

关键词: Antiferromagnetic orderings;    De Haas-van Alphen;    Function of pressure;    Heavy fermion compounds;    Magnetic transitions;    Piston cylinders;    Thermoelectric signals;    Thermopower measurements;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/592/1/012002/pdf
DOI  :  10.1088/1742-6596/592/1/012002

来源: IOP

【 摘 要 】

We report the evolution of thermoelectric power under hydrostatic pressure up to 17 kbar and at low temperature in the heavy fermion compound CeRh2Si2. These measurements were performed using a thermoelectric setup specially designed for piston cylinder pressure cells. The suppression of the antiferromagnetic order (AF) into a paramagnetic order (PM) state was studied and the (T, P) phase diagram was precisely obtained. The different magnetic transitions at low temperature as a function of pressure, AF1-AF2transition at P'cand AF1-PM transition at Pc, show significant changes in the thermoelectric signal. This support reconstructions of the Fermi surface in agreement with previous de Haas van Alphen experiments.