Observation of a superconducting state of a topological superconductor candidate, FeTe_0.6Se_0.4, equipping ferromagnetic electrodes with perpendicular magnetic anisotropy

Abstract

Iron selenide telluride, FeTeSe, is an attractive layered material for both superconductivity and spintronics applications. FeTeSe enables Ising-type superconductivity, which involves spin-momentum locking. We report superconductivity of mechanically exfoliated thin film FeTe 0.6 Se 0.4 that equips ferromagnetic electrodes with perpendicular magnetic anisotropy to detect possible Ising spin paring. The superconducting transition is observed at T = 15 K. More importantly, the upper critical field of FeTe 0.6 Se 0.4 is anisotropic and the in-plane upper critical field is measured to be 145 T. These results show that the superconductivity of thin film FeTe 0.6 Se 0.4 is robust and FeTe 0.6 Se 0.4 can be a potential material stage for superspintronics.

Exotic rare earth-based materials for emerging spintronic technology

“…Modern data storage devices based on magnetic random-access memory (MRAM) require strong perpendicular magnetic anisotropy for ultrahigh-density storage and reduction in energy consumption. In addition to this, PMA materials are also required in various magnetism and spintronics research such as spin transistor and topological superconductor for the injection and detection of spins perpendicular to the sample plane [130][131][132].…”