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−xMxGeO3 (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 ZnxGeO3 and Cu1−xNixGeO3, 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.

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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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