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Quantitative agreement of Dzyaloshinskii-Moriya interactions for domain-wall motion and spin-wave propagation
Dae-Yun Kim, Nam-Hui Kim, Yong-Keun Park +10
The magnetic exchange interaction is the one of the key factors governing the basic characteristics of magnetic systems. Unlike the symmetric nature of the Heisenberg exchange inte…
Empirical correlation between the interfacial Dzyaloshinskii Moriya interaction and work function in metallic magnetic trilayers
Yong-Keun Park, Dae-Yun Kim, Joo-Sung Kim +5
The Dzyaloshinskii Moriya interaction (DMI) generates intriguing chiral magnetic objects such as magnetic skyrmions and chiral domain walls that can be used as building blocks in e…
Deterministic creation and deletion of a single magnetic skyrmion observed by direct time-resolved X-ray microscopy
Seonghoon Woo, Kyung Mee Song, Xichao Zhang +12
Spintronic devices based on magnetic skyrmions are a promising candidate for next-generation memory applications due to their nanometre-size, topologically-protected stability and…
Spin-orbit torque-driven skyrmion dynamics revealed by time-resolved X-ray microscopy
Seonghoon Woo, Kyung Mee Song, Hee-Sung Han +10
Magnetic skyrmions are topologically-protected spin textures with attractive properties suitable for high-density and low-power spintronic device applications. Much effort has been…
Chirality-induced Antisymmetry in Magnetic Domain-Wall Speed
Dae-Yun Kim, Min-Ho Park, Yong-Keun Park +6
In chiral magnetic materials, numerous intriguing phenomena such as built in chiral magnetic domain walls (DWs) and skyrmions are generated by the Dzyaloshinskii Moriya interaction…
Magnetic Domain-Wall Tilting due to Domain-Wall Speed Asymmetry
Dae-Yun Kim, Min-Ho Park, Yong-Keun Park +8
Chiral magnetic materials provide a number of challenging issues such as the highly efficient domain wall (DW) and skyrmion motions driven by electric current, as of the operation…
Angle-dependence and optimal design for magnetic bubblecade with maximum speed
Duck-Ho Kim, Kyoung-Woong Moon, Sang-Cheol Yoo +4
Unidirectional magnetic domain-wall motion is a key concept underlying next-generation application devices. Such motion has been recently demonstrated by applying an alternating ma…
Wide-Range Probing of Dzyaloshinskii-Moriya Interaction
Duck-Ho Kim, Sang-Cheol Yoo, Dae-Yun Kim +2
Dzyaloshinskii-Moriya interaction (DMI) in magnetic objects is of enormous interest, because it generates a built-in chirality of magnetic domain walls (DWs) and topologically-prot…
Universality of Dzyaloshinskii-Moriya interaction effect over domain-wall creep and flow regimes
Duck-Ho Kim, Sang-Cheol Yoo, Dae-Yun Kim +2
Chirality causes diverse phenomena in nature such as the formation of biological molecules, antimatters, non-collinear spin structures, and magnetic skyrmions. The chirality in mag…
Drastic emergence of huge negative spin-transfer torque in atomically thin Co layers
Soong-Geun Je, Sang-Cheol Yoo, Joo-Sung Kim +3
Current-induced domain wall (DW) motion has drawn great attention in the last decades as the key operational principle of emerging magnetic memory devices. As the major driving for…
Thermally activated switching of perpendicular magnet by spin-orbit spin torque
Ki-Seung Lee, Seo-Won Lee, Byoung-Chul Min +1
We theoretically investigate the threshold current for thermally activated switching of a perpendicular magnet by spin-orbit spin torque. Based on the Fokker-Planck equation, we ob…
Asymmetric Magnetic Domain-Wall Motion by the Dzyaloshinskii-Moriya Interaction
Soong-Geun Je, Duck-Ho Kim, Sang-Cheol Yoo +3
We demonstrate here that ultrathin ferromagnetic Pt/Co/Pt films with perpendicular magnetic anisotropy exhibit a sizeable Dzyaloshinskii-Moriya interaction (DMI) effect. Such a DMI…