Title :
Ultrasonic studies of superconducting and magnetic transitions in a La2-xSrxCuO4 single crystal
Author :
Zhang, Hong ; McKenna, Mark J. ; Hucho, Carsten ; Sarma, Bimal K. ; Levy, Moises ; Kimura, T. ; Kishio, K. ; Kitazawa, K.
Author_Institution :
Dept. of Phys., Wisconsin Univ., Milwaukee, WI, USA
Abstract :
Ultrasonic attenuation and sound velocity were measured at frequencies ranging from 25 MHz to 305 MHz in a large single crystal of La2-xSrxCuO4 with nominal x of about 0.15. The observed features in attenuation and velocity suggest a relaxation process of magnetic origin at about 27 K, and those at ~37.9 K originate in the superconducting transition and a possible structural instability slightly above it
Keywords :
crystal structure; high-temperature superconductors; lanthanum compounds; magnetic transitions; strontium compounds; superconducting transition temperature; ultrasonic absorption; ultrasonic velocity; (LaSr)2CuO4; 25 to 305 MHz; 27 to 37.9 K; HTSC; La2-xSrxCuO4 single crystal; large single crystal; magnetic transitions; relaxation process; sound velocity; structural instability; superconducting transition; ultrasonic attenuation; ultrasonic studies; Acoustic propagation; Attenuation measurement; Crystals; Frequency measurement; Magnetic field measurement; Strontium; Superconducting magnets; Superconducting transition temperature; Ultrasonic variables measurement; Velocity measurement;
Conference_Titel :
Ultrasonics Symposium, 1995. Proceedings., 1995 IEEE
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-2940-6
DOI :
10.1109/ULTSYM.1995.495641
