We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Layer thickness dependence of the current-induced effective field vector in Ta|CoFeB|MgO.
- Authors
Kim, Junyeon; Sinha, Jaivardhan; Hayashi, Masamitsu; Yamanouchi, Michihiko; Fukami, Shunsuke; Suzuki, Tetsuhiro; Mitani, Seiji; Ohno, Hideo
- Abstract
Current-induced effective magnetic fields can provide efficient ways of electrically manipulating the magnetization of ultrathin magnetic heterostructures. Two effects, known as the Rashba spin orbit field and the spin Hall spin torque, have been reported to be responsible for the generation of the effective field. However, a quantitative understanding of the effective field, including its direction with respect to the current flow, is lacking. Here we describe vector measurements of the current-induced effective field in Ta|CoFeB|MgO heterostructrures. The effective field exhibits a significant dependence on the Ta and CoFeB layer thicknesses. In particular, a 1 nm thickness variation of the Ta layer can change the magnitude of the effective field by nearly two orders of magnitude. Moreover, its sign changes when the Ta layer thickness is reduced, indicating that there are two competing effects contributing to it. Our results illustrate that the presence of atomically thin metals can profoundly change the landscape for controlling magnetic moments in magnetic heterostructures electrically.
- Subjects
CURRENT-induced magnetization switching; MAGNETIC fields; MAGNETIZATION; HETEROSTRUCTURES; INTERFACES (Physical sciences); METAL analysis
- Publication
Nature Materials, 2013, Vol 12, Issue 3, p240
- ISSN
1476-1122
- Publication type
Article
- DOI
10.1038/nmat3522