机译:A mechanical spectrum study of double perovskite Y1-xCaxBaCuFeO5+delta
Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China;
Nanjing Univ, Dept Phys, Nanjing 210093, Peoples R China;
high-temperature superconductors; phase transitions; ultrasonics; TEMPERATURE INTERNAL-FRICTION; MAGNETIC-STRUCTURE; YBACUFEO5; OXYGEN; FLUCTUATIONS; DYNAMICS;