Detrimental effect of interfacial Dzyaloshinskii-Moriya interaction on perpendicular spin-transfer-torque magnetic random access memory

Journal Article · Mon Nov 16 04:00:00 EST 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4936089· OSTI ID:22486091

Jang, Peong-Hwa; Lee, Seo-Won ^[1]; Song, Kyungmi; Lee, Seung-Jae ^[2]; Lee, Kyung-Jin ^[1]

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1. Department of Materials Science and Engineering, Korea University, Seoul 136-713 (Korea, Republic of)
2. KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 136-713 (Korea, Republic of)

Interfacial Dzyaloshinskii-Moriya interaction in ferromagnet/heavy metal bilayers is recently of considerable interest as it offers an efficient control of domain walls and the stabilization of magnetic skyrmions. However, its effect on the performance of perpendicular spin transfer torque memory has not been explored yet. We show based on numerical studies that the interfacial Dzyaloshinskii-Moriya interaction decreases the thermal energy barrier while increases the switching current. As high thermal energy barrier as well as low switching current is required for the commercialization of spin torque memory, our results suggest that the interfacial Dzyaloshinskii-Moriya interaction should be minimized for spin torque memory applications.

• OSTI ID: 22486091
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 20 Vol. 107; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CONTROL
CURRENTS
DIFFUSION BARRIERS
HEAVY METALS
INTERACTIONS
LAYERS
NUMERICAL ANALYSIS
PERFORMANCE
RANDOMNESS
SKYRME POTENTIAL
SOLITONS
SPIN
STABILIZATION