Ultrasonic study on YBa2(Cu1-xZnx)3O7-δ

被引：2
|
作者：
Wang, B. M. [1 ]
Qu, J. F. [1 ]
Zhang, Y. Q. [1 ]
Li, G. [1 ]
Yuan, C. H. [1 ]
Wu, Y. [1 ]
Li, X. G. [1 ]
机构：
[1] Univ Sci & Technol China, Dept Phys, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Peoples R China
来源：
SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2007年 / 20卷 / 06期
关键词：
D O I：
10.1088/0953-2048/20/6/013
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Ultrasonic attenuation and velocity measurements in the megahertz frequency range have been performed on YBa2(Cu1-xZnx)(3)O7-d (x = 0, 0.01, 0.02, 0.03, 0.04 and 0.05) by a pulse-echo method below 200 K in magnetic fields up to 14 T. Three attenuation peaks located at 70, 130 and 170 K (P-1, P-2 and P-3) were observed. From the Zn concentration, frequency, magnetic field and oxygen content dependences of the three peaks, it is suggested that P1 is associated with the short-distance jump of polarons formed by holes in the CuO2 planes, P-2 is ascribed to the jump of apical oxygen atoms between off-centred positions induced by the Jahn-Teller effect and P-3 is related to the jump of oxygen atoms in the Cu-O chains, respectively.
引用
收藏
页码：564 / 568
页数：5
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