Effects of Ga doping on the magnetic ordering of Pr in PrBa 2Cu3O7

W. H. Li, C. J. Jou, S. T. Shyr, K. C. Lee, J. W. Lynn, H. L. Tsay, H. D. Yang

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Abstract

Neutron-diffraction and ac-susceptibility measurements have been performed to study the effects of Ga doping on the magnetic ordering of the Pr in PrBa2(Cu1-xGax)3O7. The Ga atoms preferentially replace the Cu atoms in the CuO-chain layers, and this substitution is found to decrease the antiferromagnetic ordering temperature as the Ga concentration is increased. In addition, the spin arrangement along the c axis is found to change from nearest neighbors being antiparallel for x=0 to nearest neighbors being parallel for x=0.08 (24% Cu chain substitution); for an intermediate x of 0.04 a mixture of the two spin structures is observed. The susceptibility results exhibit Curie-Weiss behavior above TN, and departures from this behavior in the ordered state.

Original languageEnglish
Pages (from-to)7136-7138
Number of pages3
JournalJournal of Applied Physics
Volume76
Issue number10
DOIs
StatePublished - 1994

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