Junction size dependence of the heat controlled magnetic anisotropy in magnetic tunnel junctions. (15th December 2021)

• Record Type: Journal Article
• Authors: Goto, Minori; Kobayashi, Reika; Okuno, Ryota; Mizuno, Tomohito; Yamane, Takekazu; Degawa, Naomichi; Suzuki, Tsuyoshi; Shimura, Atsushi; Aoki, Susumu; Urabe, Junichiro; Hara, Shinji; Nomura, Hikaru; Suzuki, Yoshishige
• Is Part Of: Applied physics express. Volume 15:Number 1(2022)
• Publication Date: 2021-12-15
• Subjects: heat controlled magnetic anisotropy -- magnetic tunnel junction -- thermal resistance; Physics -- Periodicals; Technology -- Periodicals; 621.05
• DOI: 10.35848/1882-0786/ac3faf
• Languages: English
• ISSNs: 1882-0778

Abstract

Abstract: We investigated the heat controlled magnetic anisotropy (HCMA) in magnetic tunnel junctions with various junction sizes. We evaluated the HCMA from perpendicular magnetic anisotropy under a direct current voltage measured by the spin-torque diode technique. The maximum HCMA magnitude of 5.4 μ J (Wm) −1 was observed, and the HCMA increased with increasing diameter. Our results can be explained by a simple heat dissipation model and suggest that the in-plane heat current affects HCMA.