Effects of chiral helimagnets on vortex states in a superconductor. (13th October 2016)

• Record Type: Journal Article
• Authors: Fukui, Saoto; Kato, Masaru; Togawa, Yoshihiko
• Is Part Of: Superconductor science & technology. Volume 29:Number 12(2016:Dec.)
• Publication Date: 2016-10-13
• Subjects: chiral helimagnet -- superconductor/magnet bilayer -- vortex -- Ginzburg–Landau equations -- finite element method; 74.25.Uv -- 74.20.De -- 74.81.-g -- 75.50.Cc; Superconductivity -- Periodicals; Superconductors -- Periodicals; 537.623
• DOI: 10.1088/0953-2048/29/12/125008
• Languages: English
• ISSNs: 0953-2048

Abstract

Abstract: We have investigated vortex states in chiral helimagnet/superconductor bilayer systems under an applied external magnetic field H appl, using the Ginzburg–Landau equations. Effect of the chiral helimagnet on the superconductor is taken as a magnetic field H CHM, which is perpendicular to the superconductor and oscillates spatially. For H appl = 0 and weak H CHM, there appear pairs of up- and down-vortices. Increasing H appl, down-vortices gradually disappear, and the number of up-vortices increases in the large magnetic field region. Then, up-vortices form parallel, triangular, or square structures.