Title :
Ultrasonic measurements in the superconducting state of URu2 Si2
Author :
Ran, Q.Z. ; Lin, S.-W. ; Adenwalla, S. ; Hinks, D.G. ; Zhao, Z. ; Ketterson, J.B. ; Levy, M. ; Sarma, Bimal K.
Author_Institution :
Dept. of Phys., Wisconsin Univ., Milwaukee, WI, USA
Abstract :
Measurements of attenuation, velocity, and AC susceptibility on a URu2Si2 single crystal in the frequency range from 32 to 300 MHz and the temperature range from 300 mK up to 25 K are reported. The measurements of ultrasound and AC susceptibility were performed on the same single crystal of URu2Si2 (0.37 cm long) in the vicinity of the Neel transition temperature T N and the superconducting transition temperature T c. The results show sharp signatures at TN and near Tc. The measurements of both attention and velocity across the superconducting transition show an attenuation peak and jump, respectively. The results of a magnetic field sweep indicate that URu2Si2 may also show a magnetic-field-induced phase transition
Keywords :
Neel temperature; antiferromagnetic properties of substances; heavy fermion superconductors; magnetic superconductors; magnetic susceptibility; ruthenium alloys; silicon alloys; superconducting transition temperature; ultrasonic absorption; ultrasonic velocity; uranium alloys; 300 mK to 25 K; 32 to 300 MHz; AC susceptibility; Neel transition temperature; URu2Si2; US attenuation; US velocity; antiferromagnetic superconductor; attenuation peak; heavy-fermion superconductor; magnetic field sweep; magnetic-field-induced phase transition; single crystal; superconducting transition temperature; Attenuation measurement; Frequency measurement; Magnetic field measurement; Performance evaluation; Superconducting magnets; Superconducting transition temperature; Temperature distribution; Ultrasonic imaging; Ultrasonic variables measurement; Velocity measurement;
Conference_Titel :
Ultrasonics Symposium, 1990. Proceedings., IEEE 1990
Conference_Location :
Honolulu, HI
DOI :
10.1109/ULTSYM.1990.171557
