Gd3+ electron paramagnetic resonance in the quasi-two-dimensional antiferromagnet YBa2Cu3O6.02:Gd

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Abstract

Electron paramagnetic resonance (EPR) at 9.25 GHz of Y1-xGdxBa2Cu3O6.02 (0.001 < x < 0.05) powder magnetically a ligned along the crystallographic c-direction shows a well resolved Gd3+ fine structure. The crystalline field parameters are determined and their temperature dependence discussed. Due to the special symmetry the exchange interaction between Gd3+ and antiferromagnetic CuO2 layers is small, contrary to Y2-uGduBaCuO5 where Gd3+ and Cu2+ magnetizations are strongly coupled. EPP serves as a probe for internal fields HI at the Gd sites; in Y0.99Gd0.01Ba2Cu2.97Fe0.03O6.02HI<15 G despite the Fe-induced magnetic transition.

Original languageEnglish
Pages (from-to)301-306
Number of pages6
JournalPhysica C: Superconductivity and its applications
Volume167
Issue number3-4
DOIs
Publication statusPublished - May 1 1990

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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