2025/12/19 by Alexander J. Grutter, Nurul Fitriyah, Grutter, Alexander J. +23
Materials Science · Physics and Astronomy · #FOS: Physical sciences #Iron-based superconductors research #Magnetic and transport properties of perovskites and related materials #Materials Science (cond-mat.mtrl-sci) #Physics of Superconductivity and Magnetism #Strongly Correlated Electrons (cond-mat.str-el) #Superconductivity (cond-mat.supr-con)
paper · doi:10.48550/arxiv.2512.18005
openalex publication_date 2025/12/19 · openalex created_date 2025/12/24 · openalex updated_date 2026/07/28
High-temperature and high-magnetic-field-induced re-entrant superconductivity has been discovered in the infinite-layer nickelate \mathrmSm1-x-y Eux Cay Ni O2 (SECNO). Infinite-layer nickelates are the closest known analogues of high-Tc cuprate superconductors, yet they host distinct magnetic ground states. Using low-energy muon spin relaxation and polarized neutron reflectometry, we reveal the magnetic order in SECNO. We find that magnetic freezing occurs at a higher-temperature than in other nickelate compounds, and that a substantial net magnetization of 55 kA m-1 ±10 kA m-1 emerges and remains largely unchanged across the superconducting transition. The magnetism in SECNO is disordered and nonuniform.