Low-frequency internal friction of La2Cu1−xNixO4+δ oxides

✍ Scribed by Chunli Yang; Xiusheng Wu; Zhijun Chen; Haiying Gao; Wei Liu

• Publisher: Elsevier Science
• Year: 2009
• Tongue: English
• Weight: 573 KB
• Volume: 163
• Category: Article
• ISSN: 0921-5107
• DOI: 10.1016/j.mseb.2009.04.020

✦ Synopsis

The low-frequency internal friction Q -1 and relative shear modulus M of La 2 Cu 1-x Ni x O 4+ı (0 ≤ x ≤ 1) compounds were measured. For x ≤ 0.005, there are two relaxation internal friction peaks around 200 and 250 K, both due to the hopping of the interstitial O atoms, while the peak located at lower temperature is invisible for 0.015 ≤ x ≤ 1. The 3D ordering process of interstitial oxygen occurs at x ≈ 0.5 (ı ≈ 0.082) and the fraction of the 3D ordering phase increases as a function of Ni content.