Abstract
The low-frequency internal friction Q-1 and relative shear modulus M of La2Cu1-xZnxO4+δ (0≤x≤02) compounds were studied. It was found that for 0≤x≤0005, there are two relaxation internal friction peaks around 200 K and 250 K, which are both due to the hopping of the excess O atoms; while for 005≤x≤02, only one relaxation peak exists around 250 K and this peak is due to the hopping of O pairs. The position of the structure phase transition revealed by shear modulus moves to higher temperature side with the increase of Zn content. In addition, the temperature of relaxation internal friction peaks also increases with the rise of Zn content.
Abstract
The low-frequency internal friction Q-1 and relative shear modulus M of La2Cu1-xZnxO4+δ (0≤x≤02) compounds were studied. It was found that for 0≤x≤0005, there are two relaxation internal friction peaks around 200 K and 250 K, which are both due to the hopping of the excess O atoms; while for 005≤x≤02, only one relaxation peak exists around 250 K and this peak is due to the hopping of O pairs. The position of the structure phase transition revealed by shear modulus moves to higher temperature side with the increase of Zn content. In addition, the temperature of relaxation internal friction peaks also increases with the rise of Zn content.
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