Optical study of antiferromagnetic single crystals Y12xPrxBa2Cu3O6 in high magnetic fields

نویسندگان

  • A. Zibold
  • H. L. Liu
  • D. B. Tanner
  • J. Y. Wang
چکیده

Infrared measurements and linear-spin-wave calculations for single-crystal Y12xPr xBa2Cu3O6 (x50.0, 0.4, 1.0! in magnetic fields up to 30 T show that absorption features which have been ascribed to magnon excitations are very insensitive to the applied field. The substitution of Pr for Y leads to an additional absorption feature, which does have a strong field dependence. This excitation is assigned to an intermultiplet transition in the Pr ion. The zero-field temperature dependence of this absorption shows clear evidence of an interaction between Cu and Pr spins. @S0163-1829~97!14117-0#

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تاریخ انتشار 1997