Effect of superconductivity on the magnetic properties of YBa<sub>2</sub>Cu<sub>3</sub>O<sub>7−δ</sub>/Pr<sub>0.5</sub>La<sub>0.2</sub>Ca<sub>0.3</sub>MnO<sub>3</sub> heterostructures

ORAL

Abstract

We studied competing magnetic and superconducting interactions in Pr0.5La0.2Ca0.3MnO3 / YBa2Cu3O7−δ /Pr0.5La0.2Ca0.3MnO3 (PLCMO/YBCO/PLCMO) heterostructures. A highly sensitive and selective magnetic field-modulated microwave absorption spectroscopy (MFMMS) technique was used to compare the superconducting properties of single YBCO thin films to PLCMO/YBCO/PLCMO heterostructures. The MFMMS showed clear influence of the PLCMO magnetic state on the superconducting transition and vortex dynamics of the YBCO film. Surprisingly, magnetization measurements revealed that the magnetic anisotropy of PLCMO is strongly modified by the superconducting state of the YBCO layer. Our results, in combination with micromagnetic simulations, suggest that the superconductivity changes the temperature-dependent ratio of the ferromagnetic-metallic and antiferromagnetic-insulating domains. This unusual observation of the effect of superconductivity on magnetism in these well-studied quantum materials when in proximity shows that they are still a rich playground for new physics.

*The research at UCSD was supported by the US Department of Energy's Office of Basic Energy Science, under grant # DE-FG02-87ER45332. JGR Acknowledge funding from Uniandes via the STAI program.

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Presenters

  • ALI C BASARAN

    • University of California, San Diego

Authors

  • ALI C BASARAN

    • University of California, San Diego

  • Diego Carranza-Celis

    • UNIVERSIDAD DE LOS ANDES

  • Juan G Ramirez

    • UNIVERSIDAD DE LOS ANDES

  • Christian T Wolowiec

    • University of California, San Diego

  • Christian Bernhard

    • University of Fribourg
    • Department of Physics, University of Fribourg, CH-1700 Fribourg, Switzerland

  • IVAN K SCHULLER

    • University of California, San Diego
    • Department of Physics, University of California San Diego
    • Department of Physics, University of California, San Diego