Interface Effects on Magnetic Flux Pinning in La0.7Sr0.3MnO3/YBa 2Cu3O7- x Bilayers

Sayan Chaudhuri; You-Sheng Chen; Jauyn Grace Lin

doi:10.1021/acsomega.2c07928

Interface Effects on Magnetic Flux Pinning in La_0.7Sr_0.3MnO₃/YBa ₂Cu₃O_{7- x} Bilayers

ACS Omega. 2023 May 1;8(19):16694-16699. doi: 10.1021/acsomega.2c07928. eCollection 2023 May 16.

Authors

Sayan Chaudhuri¹, You-Sheng Chen¹, Jauyn Grace Lin^{1

2}

Affiliations

¹ Center for Condensed Matter Science, National Taiwan University, Taipei 10617 Taiwan.
² Center of Atomic Initiatives for New Materials, National Taiwan University, Taipei 10617, Taiwan.

Abstract

The magnetic pinning properties of a ferromagnet/superconductor hybrid structure consisting of a La_0.7Sr_0.3MnO₃(LSMO) layer with various thicknesses on top of a fixed thickness YBa₂Cu₃O_7-x (YBCO) layer are investigated in this article. The existence of a weakly magnetic layer was identified at the interface between YBCO and LSMO by a ferromagnetic resonance (FMR) study. Magnetic moment and anisotropy of the interfacial layer were probed using the angular-dependent FMR study. This layer gives rise to an additional flux pinning contribution to the bulk magnetic pinning from the LSMO layer. Our study provides insight into the complex interface physics in the LSMO/YBCO bilayer system, promoting a new pathway for the development of novel flux pinning-related functionality.