Journal Article

PUBDB-2019-00323

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Fast current-driven domain walls and small skyrmions in a compensated ferrimagnet

Caretta, L. (Corresponding author)Extern* ; Mann, M.Extern* ; Buettner, F.Extern* ; Kohei, U. ; Pfau, B.Extern* ; Guenther, C.Extern* ; Hessing, P.Extern* ; Churikova, A.Extern* ; Klose, C.Extern* ; Schneider, M.Extern* ; Engel, D. ; Marcus, C. ; Bono, D. ; Bagschik, K.Extern*DESY* ; Eisebitt, S.Extern* ; Beach, G.Extern*

2018
Nature Publishing Group London [u.a.]

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Please use a persistent id in citations: doi:10.1038/s41565-018-0255-3

Abstract: Spintronics is a research field that aims to understand and control spins on the nanoscale and should enable next-generation data storage and manipulation. One technological and scientific key challenge is to stabilize small spin textures and to move them efficiently with high velocities. For a long time, research focused on ferromagnetic materials, but ferromagnets show fundamental limits for speed and size. Here, we circumvent these limits using compensated ferrimagnets. Using ferrimagnetic Pt/Gd44Co56/TaOx films with a sizeable Dzyaloshinskii-Moriya interaction, we realize a current-driven domain wall motion with a speed of 1.3 km s-1 near the angular momentum compensation temperature (TA) and room-temperature-stable skyrmions with minimum diameters close to 10 nm near the magnetic compensation temperature (TM). Both the size and dynamics of the ferrimagnet are in excellent agreement with a simplified effective ferromagnet theory. Our work shows that high-speed, high-density spintronics devices based on current-driven spin textures can be realized using materials in which TA and TM are close together.

Note: © Springer Nature Limited; Closed Access

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Contributing Institute(s):

1. Experimentebetreuung PETRA III (FS-PE)

Research Program(s):

1. 6214 - Nanoscience and Materials for Information Technology (POF3-621) (POF3-621)
2. 6G3 - PETRA III (POF3-622) (POF3-622)

Experiment(s):

1. PETRA Beamline P04 (PETRA III)

Appears in the scientific report 2018

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Database coverage:
; Clarivate Analytics Master Journal List ; ClosedAccess ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; IF >= 30 ; JCR ; NCBI Molecular Biology Database ; Nationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Web of Science Core Collection

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