We have measured ultrasonic attenuation and ac susceptibility simultaneously on a UPt3 single crystal, in various constant magnetic fields at 293 MHz, and in zero field at several frequencies. The temperature of the attenuation maximum Tmα appears lower than (or very close to) the susceptibility transition temperature Tcχ. A breakpoint is defined, which occurs always at a lower temperature Tbp than Tmα. The shift of this breakpoint, Tcχ -T bp, exhibits a small frequency dependence.
ASJC Scopus subject areas
- Physics and Astronomy(all)