Spin-transfer torque switching at ultra low current densities
- 주제(키워드) Current induced switching , Magnetic tunnel junctions , Néel-Brown law , Perpendicular anisotropy , Spin-transfer torque , Spintransport
- 등재 SCIE, SCOPUS
- 발행기관 Japan Institute of Metals (JIM)
- 발행년도 2015
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000119211
- 본문언어 영어
- Published As http://dx.doi.org/10.2320/matertrans.MA201570
- 저작권 이화여자대학교 논문은 저작권에 의해 보호받습니다.
초록/요약
The influence of the tantalum buffer layer on the magnetic anisotropy of perpendicular Co-Fe-B/MgO based magnetic tunnel junctions is studied using magneto-optical Kerr-spectroscopy. Samples without a tantalum buffer are found to exhibit no perpendicular magnetization. The transport of boron into the tantalum buffer is considered to play an important role on the switching currents of those devices. With the optimized layer stack of a perpendicular tunnel junction, a minimal critical switching current density of only 9.3kA/cm2 is observed and the thermally activated switching probability distribution is discussed. © 2015 The Japan Institute of Metals and Materials.
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