2020/01/14 by R. Matsumoto, Rie Matsumoto, Hiroshi Imamura +1 · 8 citations
Engineering · Materials Science · Physics and Astronomy · #Anisotropy #Magnetic Properties of Alloys #Magnetic anisotropy #Magnetic properties of thin films #Magnetization #Magnetoresistance #Power (physics) #Precession #Pulse (music) #Voltage #Wireless Power Transfer Systems #cond-mat.mes-hall #cond-mat.mtrl-sci
paper · pdf · doi:10.1103/physrevapplied.14.021003
published in Physical Review Applied 14(2) (American Physical Society) · 15 pages, 3 figures
arxiv created 2020/01/14 · openalex created_date 2020/02/07 · openalex publication_date 2020/08/31 · arxiv updated 2020/09/09 · openalex updated_date 2026/08/06
In spintronics, magnetization switching based on voltage control of magnetic anisotropy (VCMA) continues to attract attention, because it reduces the write power in magnetoresistive random-access memory (MRAM). Further reduction of the write power is required for next-generation MRAM. Conventionally the magnetic anisotropy (MA) is e\phantom\rule00exl\phantom\rule00exi\phantom\rule00exm\phantom\rule00exi\phantom\rule00exn\phantom\rule00exa\phantom\rule00ext\phantom\rule00exe\phantom\rule00exd during the voltage pulse, but here the authors propose a scheme in which the MA is e\phantom\rule00exn\phantom\rule00exh\phantom\rule00exa\phantom\rule00exn\phantom\rule00exc\phantom\rule00exe\phantom\rule00exd, to induce precession around an almost perpendicular axis. They show that pulse duration can be reduced to a few tens of picoseconds, without deteriorating thermal stability. Such a short pulse helps to reduce energy loss by Joule heating.