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CN 34-1054/N

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Low-frequency internal friction research on La2Cu1-xZnxO4+δ

  • 1.

    Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China

  • 2.

    School of Materials & Chemical Engineering, Anhui University of Architecture, Hefei 230022, China

Cite this: JUSTC, 2009, 39(7): 694-698
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  • Received Date: November 13, 2008
  • Revised Date: December 14, 2008
  • Published Date: July 30, 2009
    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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