New Low-Frequency Relaxation Process in La2CuO4+δ by Internal Friction Experiments
WANG Shi-Xing1, LIU Wei2, LIU Yun-Long1, ZHANG Li-De1
1Institute of Solid State Physics, Chinese Academy of Science, Hefei 230031
2Laboratory of Internal friction and Defects in Solid, University of Science and Technology of China, Hefei 230026
New Low-Frequency Relaxation Process in La2CuO4+δ by Internal Friction Experiments
WANG Shi-Xing1;LIU Wei2;LIU Yun-Long1;ZHANG Li-De1
1Institute of Solid State Physics, Chinese Academy of Science, Hefei 230031
2Laboratory of Internal friction and Defects in Solid, University of Science and Technology of China, Hefei 230026
Abstract： The low-frequency relaxation internal friction spectrum of La2CuO4+δhas been measured from -170 to 200°C in an automatic torsion apparatus at frequencies between 0.1 and 5.0Hz. Three new relaxation processes are found with maxima, which are attributed to thermally activated diffusive jumps of oxygen atoms or vacancies in the oxygen sublattice, according to various activation enthalpies of three experimental runs. It is shown that the content of oxygen defect have important influences on the physical properties of La2CuO4+δ.
WANG Shi-Xing;LIU Wei;LIU Yun-Long;ZHANG Li-De. New Low-Frequency Relaxation Process in La2CuO4+δ by Internal Friction Experiments[J]. 中国物理快报, 2000, 17(4): 282-284.
WANG Shi-Xing, LIU Wei, LIU Yun-Long, ZHANG Li-De. New Low-Frequency Relaxation Process in La2CuO4+δ by Internal Friction Experiments. Chin. Phys. Lett., 2000, 17(4): 282-284.
2000, Vol. 17 
