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Chinese Journal of High Pressure Physics  > 2004  >  18(4): 339-344 .
WU Yun-Long, XIONG Yu-Feng, DAI Wen, LI Ke-Qiang, YAO Yu-Shu, JIN Duo. Magnetic Behavior of Oxygen-Doped T-R2CuO4 (R=Nd~Tm) at Low Temperature[J]. Chinese Journal of High Pressure Physics, 2004, 18(4): 339-344 . doi: 10.11858/gywlxb.2004.04.009
Citation: WU Yun-Long, XIONG Yu-Feng, DAI Wen, LI Ke-Qiang, YAO Yu-Shu, JIN Duo. Magnetic Behavior of Oxygen-Doped T-R2CuO4 (R=Nd~Tm) at Low Temperature[J]. Chinese Journal of High Pressure Physics, 2004, 18(4): 339-344 . doi: 10.11858/gywlxb.2004.04.009
shu

Magnetic Behavior of Oxygen-Doped T-R2CuO4 (R=Nd~Tm) at Low Temperature

doi: 10.11858/gywlxb.2004.04.009
  • 1.

    Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100080, China;

  • 2.

    Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China

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  • Corresponding author: WU Yun-Long
  • Received Date: 25 Dec 2003
  • Rev Recd Date: 08 May 2004
  • Issue Publish Date: 05 Dec 2004
    Abstract
  • The weak ferromagnetic behavior arises from the size effects, which gives rise to the distortion of the T-R2CuO4 structure. In this paper, we study magnetic properties on rare-earth cuprates, R2CuO4 (R=Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er and Tm), synthesized under high oxygen pressure (6 GPa) at elevated-temperature. The magnetic susceptibility measurements show a new weak-magnetic component near a characteristic temperature of 28 K. Appearances of the low temperature weak-magnetism are independent of the rare-earth components and are a common behavior of all oxygen-doped T-R2CuO4 cuprates. We argue that (1) the weak ferromagnetic behavior occurred near 28 K couldn't be attributed to the size effects, but to the formation of ferromagnetic clusters in CuO2 planes caused by the oxygendoping under high pressure; (2) superconductivity and weak ferromagnetism seem to be exclusive in T-R2CuO4 compounds, i. e., the ferromagnetic clusters in CuO2 planes seems to be incompatible with superconductivity in these system.

     

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