Crystal Growth and Neutron Scattering Study of Spin Correlations of the T′-Structured Pr2-xCa x CuO4

Masaki Fujita, Kenji Tsutsumi, Tomohiro Miura, Sergey Danilkin

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1 Citation (Scopus)

Abstract

We studied Ca-doping effect on spin correlations in T′-structured cuprate oxide RE2CuO4 (RE: rear earth) with growing a sizable single crystal of Pr2-xCa x CuO4 (x=0.05 and 0.10) as well as synthesizing powder samples of Pr1.90Ca0.10CuO4 and Eu1.90Ca0.10CuO4. In the all as-prepared and annealed samples, no evidence of shielding signal associated with superconductivity was observed by magnetic susceptibility measurement. Elastic neutron scattering measurements on the as-grown Pr1.90Ca0.10CuO4 clarified the existence of long-ranged magnetic order with commensurate spin correlation. The ordering temperature was determined to be ∼290K, which is comparable to Néel temperature in the parent compound of Pr2CuO4. The existence of commensurate low-energy spin excitation was also confirmed by inelastic neutron scattering measurements for the annealed Pr1.95Ca0.05CuO4. These results strongly suggest a negligible Ca-doping effect on the physical properties in T′-RE2CuO4, which is quite different from the drastic doping evolution of magnetism in T-RE2CuO4.

Original languageEnglish
Article number012070
JournalJournal of Physics: Conference Series
Volume969
Issue number1
DOIs
Publication statusPublished - 2018 Apr 19
Event28th International Conference on Low Temperature Physics, LT 2018 - Gothenburg, Sweden
Duration: 2017 Aug 92017 Aug 16

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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