Geoffrey Beach: Difference between revisions
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==Affiliations== | ==Affiliations== | ||
*Department of Materials Science and Engineering, Massachusetts Institute of Technology, USA | *Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA | ||
==Title== | ==Title== | ||
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*[2] S. Emori, et al., Phys. Rev. B '''90''', 184427 (2014). | *[2] S. Emori, et al., Phys. Rev. B '''90''', 184427 (2014). | ||
*[3] N. Perez, et al., Appl. Phys. Lett. '''104''', 092403 (2014). | *[3] N. Perez, et al., Appl. Phys. Lett. '''104''', 092403 (2014). | ||
*[4] S. Woo, et al., arXiv:1502.07376 (2015). | *[4] S. Woo, et al., [http://arxiv.org/abs/1502.07376 arXiv:1502.07376] (2015). | ||
*[5] S. Woo, et al., Appl. Phys. Lett. '''105''', 212404 (2014). | *[5] S. Woo, et al., Appl. Phys. Lett. '''105''', 212404 (2014). | ||
*[6] S. Emori, et al., [http://dx.doi.org/10.1063/1.4903041 Appl. Phys. Lett. '''105''', 222401 (2014)]. | *[6] S. Emori, et al., [http://dx.doi.org/10.1063/1.4903041 Appl. Phys. Lett. '''105''', 222401 (2014)]. | ||
* [7] U. Bauer, et al., [http://www.nature.com/nmat/journal/v14/n2/abs/nmat4134.html Nature Mater. '''14''', 174 (2015)]. | *[7] U. Bauer, et al., [http://www.nature.com/nmat/journal/v14/n2/abs/nmat4134.html Nature Mater. '''14''', 174 (2015)]. | ||
Latest revision as of 16:27, 2 September 2015
Affiliations
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
Title
Spin orbit torques and chiral spin textures in ultrathin magnetic films
Abstract
Spin-orbit coupling at interfaces in ultrathin magnetic films can give rise to chiral magnetic textures such as homochiral domain walls and magnetic skyrmions, as well as current-induced torques that can efficiently manipulate them [1-3]. This talk will describe interface-driven spin-orbit torques and Dzyaloshinskii-Moriya interactions (DMIs) in ultrathin ferromagnets adjacent to nonmagnetic heavy metals. We show that the DMI depends strongly on the heavy metal, differing by a factor of ~20 between Pt and Ta [2], and describe the influence of strong DMI on domain wall dynamics [1,2] and spin Hall effect switching [3]. We then present high-resolution x-ray microscopy and scanning probe imaging of chiral magnetic skyrmions and their dynamics in multilayer films that allow the relevant energy terms to be engineered [4]. Finally, we will describe how SOTs can be enhanced through interface engineering [5] and tuned by a gate voltage [6] by directly controlling the interfacial oxygen coordination at a ferromagnet/oxide interface [7].
References
- [1] S. Emori, et al., Nature Mater. 12, 611 (2013).
- [2] S. Emori, et al., Phys. Rev. B 90, 184427 (2014).
- [3] N. Perez, et al., Appl. Phys. Lett. 104, 092403 (2014).
- [4] S. Woo, et al., arXiv:1502.07376 (2015).
- [5] S. Woo, et al., Appl. Phys. Lett. 105, 212404 (2014).
- [6] S. Emori, et al., Appl. Phys. Lett. 105, 222401 (2014).
- [7] U. Bauer, et al., Nature Mater. 14, 174 (2015).
