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Czechoslovak Journal of Physics

, Volume 46, Supplement 4, pp 1981–1982 | Cite as

Antiferromagnetic phase in Zn- and Ni-doped CuGeO3

  • Naoki Koide
  • Yoshitaka Sasago
  • Takatsugu Masuda
  • Kunimitsu Uchinokura
Magnetism (Experiment)

Abstract

The magnetic susceptibility of single crystals Cu1−x M x GeO3 (M=Zn, Ni) were investigated to study the effects of impurities on the inorganic spin-Peierls material CuGeO3. We succeeded in the growth of Zn-doped single crystals with 0.007≤x≤0.09 and Ni-doped ones withx=0.033. We determined temperature vsx phase diagram of the Zn-doped single crystals, which is almost identical to that of the polycrystaline samples. In both Cu1−x Zn x GeO3 and Cu1−x Ni x GeO3, the antiferromagnetic transition occurs below 5 K. It is proved that the easy axis of Ni-doped CuGeO3 is nearly along thea axis, while that of Zn-doped CuGeO3 is along thec axis as previously reported. This difference of spin orderings between Zn-doped and Ni-doped CuGeO3 is caused by that Ni2+ ions carry spinS=1 while Zn2+ ions are nonmagnetic.

Keywords

Polycrystalline Sample Easy Axis Single Crys Antiferromagnetic Phase Spin Ordering 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Institute of Physics, Acad. Sci. CR 1996

Authors and Affiliations

  • Naoki Koide
    • 1
  • Yoshitaka Sasago
    • 1
  • Takatsugu Masuda
    • 1
  • Kunimitsu Uchinokura
    • 1
  1. 1.Department of Applied PhysicsThe University of TokyoTokyoJapan

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