Phase diagram of CeCu2Si2 in the B-T plane

✍ Scribed by M. Hunt; P. Meeson; P.-A. Probst; P. Reinders; M. Springford; W. Assmus; W. Sun

• Publisher: Elsevier Science
• Year: 1990
• Tongue: English
• Weight: 215 KB
• Volume: 165-166
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/s0921-4526(90)81018-j

✦ Synopsis

A combination dHvA and resistivity measurements investigations on a single crystal of the heavy fermion superconductor CeCu$$ has revealed a hitherto hidden complexity in the B-T phase diagram. As well as the superconducting-normal phase boundary, with Tc=0.72K and Bc2= 1.5T, a double magnetic transition is observed which, depending on the orientation, occurs between 7.2T and 2.8T at 2OmK, and which near the c axis accompanies a possible third transition. In the cdirection at least, the two transitions merge and then vanish as the temperature rises to 470mK so revealing an occlusion in the B-T phase plane. The nature of the phase transitions is not revealed by these experiments but a minor reconstruction of the Fermi surface and a change in quasiparticle mass is seen to occur across the occlusion.