Search

Your search keyword '"Ocker B"' showing total 22 results
Start Over Author "Ocker B" Publisher aip publishing
22 results on '"Ocker B"'

1. Magnetic domain wall curvature induced by wire edge pinning

Author

Herrera Diez, L., primary, Ummelen, F., additional, Jeudy, V., additional, Durin, G., additional, Lopez-Diaz, L., additional, Diaz-Pardo, R., additional, Casiraghi, A., additional, Agnus, G., additional, Bouville, D., additional, Langer, J., additional, Ocker, B., additional, Lavrijsen, R., additional, Swagten, H. J. M., additional, and Ravelosona, D., additional

Published
2020
Full Text
View/download PDF

2. Investigation of the Dzyaloshinskii-Moriya interaction and room temperature skyrmions in W/CoFeB/MgO thin films and microwires

Author

Massachusetts Institute of Technology. Department of Materials Science and Engineering, Lemesh, Ivan, Beach, Geoffrey Stephen, Jaiswal, S., Litzius, K., Büttner, F., Finizio, S., Raabe, J., Weigand, M., Lee, K., Langer, J., Ocker, B., Jakob, G., Kläui, M., Massachusetts Institute of Technology. Department of Materials Science and Engineering, Lemesh, Ivan, Beach, Geoffrey Stephen, Jaiswal, S., Litzius, K., Büttner, F., Finizio, S., Raabe, J., Weigand, M., Lee, K., Langer, J., Ocker, B., Jakob, G., and Kläui, M.

Abstract

Recent studies have shown that material structures, which lack structural inversion symmetry and have high spin-orbit coupling can exhibit chiral magnetic textures and skyrmions which could be a key component for next generation storage devices. The Dzyaloshinskii-Moriya Interaction (DMI) that stabilizes skyrmions is an anti-symmetric exchange interaction favoring non-collinear orientation of neighboring spins. It has been shown that materials systems with high DMI can lead to very efficient domain wall and skyrmion motion by spin-orbit torques. To engineer such devices, it is important to quantify the DMI for a given material system. Here, we extract the DMI at the Heavy Metal/Ferromagnet interface using two complementary measurement schemes, namely, asymmetric domain wall motion and the magnetic stripe annihilation. By using the two different measurement schemes, we find for W(5 nm)/Co₂₀Fe₆₀B₂₀(0.6 nm)/MgO(2 nm) the DMI to be 0.68 ± 0.05 mJ/m² and 0.73 ± 0.5 mJ/m², respectively. Furthermore, we show that this DMI stabilizes skyrmions at room temperature and that there is a strong dependence of the DMI on the relative composition of the CoFeB alloy. Finally, we optimize the layers and the interfaces using different growth conditions and demonstrate that a higher deposition rate leads to a more uniform film with reduced pinning and skyrmions that can be manipulated by spin orbit torques., United States. Department of Energy. Office of Basic Energy Sciences (Award DE-SC0012371)

Published
2018

15. Spin torque driven excitations in a synthetic antiferromagnet

Author

Houssameddine, D., primary, Sierra, J. F., additional, Gusakova, D., additional, Delaet, B., additional, Ebels, U., additional, Buda-Prejbeanu, L. D., additional, Cyrille, M.-C., additional, Dieny, B., additional, Ocker, B., additional, Langer, J., additional, and Maas, W., additional

Published
2010
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results