Influence of superconducting proximity effect in LSMO/SIO Ferromagnetic Resonance

POSTER

Abstract

Superconductivity and ferromagnetism are antagonistic phenomena: singlet-state Cooper pairs with antiparallel spins cannot survive in a ferromagnet. In some cases, triplet-state Cooper pairs, in which electrons have parallel spins, can be formed by proximity effect at ferromagnetic interfaces. We experimentally investigate ferromagnetic resonance (FMR) in trilayers consisting of a half-metallic La0.7Sr0.3MnO3 and YBa2Cu3O7 superconducting layers, with an interlayer of SrIrO3, a high spin-orbit coupling material, which is expected to create a strong inhomogeneity of the magnetic field in momentum space. The FMR signal is studied as a function of temperature (10-150 K). It reveals a drastic change in the resonance signal when the YBa2Cu3O7 becomes superconducting. This change will be discussed in terms of the formation of triplet Cooper, favored by the high spin-orbit coupling of SrIrO3. The results will be discussed in the frame of the spin-pumping theory considering the superconductor a spin sink where part of the FMR generated angular momentum can relax.

*Work supported by AEI grant MAT2017-87134-C2-1-R

Presenters

  • David Sanchez-Manzano

    • CNRS/THALES
    • Universidad Complutense de Madrid

Authors

  • David Sanchez-Manzano

    • CNRS/THALES
    • Universidad Complutense de Madrid

  • Santiago Carreira

    • Unité Mixte de Physique CNRS/Thales

  • Victor Rouco

    • Física de Materiales, GFMC, Universidad Complutense de Madrid
    • Universidad Complutense de Madrid
    • Física de Materiales, Universidad Complutense de Madrid

  • Andrea Peralta

    • Universidad Complutense de Madrid

  • Fabian Cuellar

    • Universidad Complutense de Madrid
    • Física de Materiales, Universidad Complutense de Madrid

  • Alberto Rivera

    • Universidad Complutense de Madrid
    • Departamento de Física de Materiales, Universidad Complutense de Madrid
    • Física de Materiales, Universidad Complutense de Madrid

  • Anke Sander

    • CNRS/THALES
    • Unité Mixte de Physique CNRS/Thales
    • Unité Mixte de Physique CNRS/Thales, Universite Paris-Saclay
    • Unité Mixte de Physique, CNRS, Thales, Université Paris-Saclay, 91767 Palaiseau, France
    • Unité Mixte de Physique, CNRS/Thales
    • Unité Mixte de Physique, CNRS, Thales, Université Paris-Saclay, 91767, Palaiseau, France

  • Carlos Leon

    • Universidad Complutense de Madrid
    • Física de Materiales, Universidad Complutense de Madrid

  • Javier E Villegas

    • CNRS/THALES
    • Unité Mixte de Physique CNRS/Thales
    • Unité Mixte de Physique, CNRS, Thales, Université Paris-Saclay, 91767 Palaiseau, France
    • Unité Mixte de Physique, CNRS/Thales
    • Unité Mixte de Physique, CNRS, Thales, Université Paris-Saclay, 91767, Palaiseau, France

  • Jacobo Santamaria

    • Física de Materiales, GFMC, Universidad Complutense de Madrid
    • Universidad Complutense de Madrid
    • GFMC, Universidad Complutense de Madrid
    • Grupo de Física de Materiales Complejos, Dpt. Física de Materiales, Universidad Complutense de Madrid, 28040 Madrid, Spain
    • Física de Materiales, Universidad Complutense de Madrid