Abstract
We present measurements of the elastic constants for some of the known heavy fermion superconductors at low temperatures and high magnetic fields. In these compounds the superconducting phase lies embedded in another phase of more or less strongly magnetic nature. In contrast to the cases of UPt 3, URu 2Si 2 and UPd 2Al 3 where the superconductivity coexists with antiferromagnetic order, our results indicate that in high quality CeCu 2Si 2 single crystals the superconductivity does not coexist with the embedded phase but rather expels it. The influence of the Cu stoichiometry on the physical properties and on the B- T phase diagram of CeCu 2Si 2 is discussed. In addition we find pronounced elastic anomalies in magnetic fields up to 23 T, which yield a detailed B- T phase diagram for CeCu 2Si 2. By comparison with results obtained with other methods we gain information about the nature of various transitions. Further we show magnetoacoustic quantum oscillations (MAQO) and other magnetoacoustic effects in the heavy fermion superconductors.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
