2023/11/23 by Biswajit Dutta, Sonam Bhakat, Dutta, Biswajit +5 · 1 citation
Engineering · Physics and Astronomy · #FOS: Physical sciences #Ferroelectric and Negative Capacitance Devices #Magnetic properties of thin films #Physics of Superconductivity and Magnetism #Superconductivity (cond-mat.supr-con)
paper · pdf · doi:10.48550/arxiv.2311.14170
openalex publication_date 2023/11/23 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Ferromagnetism's ability to influence superconducting order is well known and well established, but the converse phenomena remains relatively less explored. Theoretical work on the subject includes Anderson and Suhl prediction of a crypto-ferromagnetic state, and De Gennes proposal of two ferromagnetic insulators exchange coupled through a superconductor. In this study, we present compelling evidence of coexistence of both phenomena in a superconducting spin valve system. We demonstrate that superconducting exchange coupling enables reliable bistable states, and the coexistence of SEC and CFM leads to a wide range of reproducible zero field micro-magnetic states in the SSV, which are a function of the strength of the superconducting state. These micromagnetic states can in turn influence the superconducting state, leading to multiple reproducible and non-volatile resistance states; thus paving the way for a novel direction in cryogenic in-memory computing.