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Focus Session @ DPG 2014: Chiral Domain Walls

German Physical Society

begin
02.Apr.2014 09:30
end
02.Apr.2014 12:30
venue
Dresden, Germany

Chiral domain walls in ultrathin films

During the last year, we witnessed a break through in the observation and application of chiral domain walls to spintronics. A couple of years ago [1] the presence of chiral domain walls due to the Dzyaloshinskii-Moriya interaction in perpendicularly magnetized structure-inversion asymmetric Fe films on W(110) was theoretically predicted and experimentally confirmed by spin-polarized scanning tunneling microscopy [2]. Using the Bauer-LEEM at Berkeley, Yizheng Wu [3,4] and his group were able to show that these novel types of walls in ultrathin films are a rather general phenomenon and that the chirality or "handedness" of the domain wall can be engineered using different materials, stacking and combinations.

André Thiaville [5] showed that the Dzyaloshinskii-Moriya interaction stabilizes the domain wall during motion and larger speeds can be sustained till the walker breakdown sets in. How currents excite chiral domain walls and how this fits in into a potential device concept was central to the study undertaken by the Parkin [6] and Beach groups [7]. I think this is an exciting new direction that should be highlighted.


[1] Heide, M., Bihlmayer G., and Blügel S., Phys. Rev. B 78, 
140403 (2008).

[2] Meckler, S., Mikuszeit N., Preßler A., Vedmedenko E.Y., Pietzsch O., and Wiesendanger R., Phys. Rev. Lett. 103, 157201 (2009).

[3] G. Chen, J. Zhu, A. Quesada, J. Li, A. T. N’Diaye, Y. Huo, T. P. Ma, Y. Chen, H. Y. Kwon, C. Won, Z. Q. Qiu, A. K. Schmid, and Y. Z. Wu, Phys. Rev. Lett. 110, 177204 (2013).

[4] Chen, G., Ma, T., N'diaye, A.T., Kwon, H., Won, C., Wu Y.Z., Schmid A.K., Nature Commun. 4  2671 (2013).

[5] Thiaville, A., Rohart, S., Jue, E., Cros, V. & Fert, A. Europhys Lett. 100, 57002 (2012).

[6] Thomas, L., Ryu, K-S., Yang, S-H. & Parkin, S. S. P. Nature Nanotech. 8, 527   (2013).

[7] Emori, S., Bauer, U., Ahn, S-M., Martinez, E. & Beach, G. S. D. Nature Mater. 12, 611 (2013).

 

Duration:1 Day
Contributions:Invited and contributed talks, poster session 

 

Invited Speakers:

Matthias Bode (confirmed)

Julius-Maximilians University of Würzburg, Germany
Tentative Title: Chiral domain walls in Fe nano wires on W(110) 

YiZheng Wu (confirmed)

Department of Physics, State Key Laboratory of Surface Physics and Advanced Materials Laboratory, Center for Spintronic Devices and Applications, Fudan University, Shanghai, China
Tentative Titel: Tailoring the chirality of magnetic domain walls by interface engineering

André Thiaville 

Laboratoire de Physique des Solides, Univ. Paris-Sud
Tentative Titel: Dynamics of Dzyaloshinskii domain walls in ultrathin magnetic films

Geoffrey S. D. Beach (confirmed)

Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge
Tentative Titel: Current-driven dynamics of chiral ferromagnetic domain walls


Session Organizer:

Stefan Blügel,
Forschungszentrum Jülich,
Germany

Contact

Prof. Dr. Stefan Blügel
Phone: +49 2461 61-4249
Fax: +49 2461 61-2850
email: s.bluegel@fz-juelich.de

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