Journal
PHYSICAL REVIEW B
Volume 98, Issue 10, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.98.104432
Keywords
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Funding
- Naval Innovation Science and Engineering Program
- US Department of Energy, Office of Basic Energy Sciences [DE-SC0003678]
- US Department of Energy [DE-AC02-05CH11231]
- National Research Council's Research Associateship Program
- Leading Foreign Research Institute Recruitment Program through the National Research Foundation (NRF) of Korea - Ministry of Education, Science and Technology (MEST) [2012K1A4A3053565]
- DGIST Research and Development program of the Ministry of Science, Information and Communications Technology (ICT) and Future Planning [18-BT-02]
- [R13.0004.04]
- Ministry of Science & ICT (MSIT), Republic of Korea [18-BT-02] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2012K1A4A3053565] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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We demonstrate deterministic control of dipole-field-stabilized skyrmions by means of spin-orbit torques arising from heavy transition-metal seed layers. Experiments are performed on amorphous Fe/Gd multilayers that are patterned into wires and exhibit stripe domains and dipole skyrmions at room temperature. We show that while the domain walls and skyrmions are achiral on average due to lack of Dzyaloshinskii-Moriya interactions, the Neel-like closure domain walls at each surface are chiral and can couple to spin-orbit torques. The current-induced domain evolutions are reported for different magnetic phases, including disordered stripe domains, coexisting stripes and dipole skyrmions, and a close-packed dipole skyrmion lattice. The magnetic textures exhibit motion under current excitations with a current density similar to 10(8)A/m(2). By comparing the motion resulting from magnetic spin textures in Fe/Gd films with different heavy transition-metal interfaces, we confirm spin currents can be used to manipulate achiral dipole skyrmions via spin-orbit torques. We further show the current-induced response of a dipole skyrmion lattice where skyrmions move in channels between pinned regions.
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