Moon, Kyoung-Woong Kim, Duck-Ho Yoo, Sang-Cheol Je, Soong-Geun Chun, Byong Sun Kim, Wondong Min, Byoung-Chul Hwang, Chanyong Choe, Sug-Bong 2024-01-20T07:32:47Z 2024-01-20T07:32:47Z 2021-09-05 2015-03 2045-2322 https://pubs.kist.re.kr/handle/201004/125691 Unidirectional motion of magnetic domain walls is the key concept underlying next-generation domain-wall-mediated memory and logic devices. Such motion has been achieved either by injecting large electric currents into nanowires or by employing domain-wall tension induced by sophisticated structural modulation. Herein, we demonstrate a new scheme without any current injection or structural modulation. This scheme utilizes the recently discovered chiral domain walls, which exhibit asymmetry in their speed with respect to magnetic fields. Because of this asymmetry, an alternating magnetic field results in the coherent motion of the domain walls in one direction. Such coherent unidirectional motion is achieved even for an array of magnetic bubble domains, enabling the design of a new device prototype-magnetic bubblecade memory-with two-dimensional data-storage capability. English NATURE PUBLISHING GROUP Magnetic bubblecade memory based on chiral domain walls Article 10.1038/srep09166 1 SCIENTIFIC REPORTS, v.5 SCIENTIFIC REPORTS 5 scie scopus 000351181900002 2-s2.0-84951730305 Multidisciplinary Sciences Science & Technology - Other Topics Article WEAK FERROMAGNETISM SHIFT REGISTER SKYRMION DYNAMICS MOTION TEMPERATURE NANOWIRE LOGIC FILM Electrical and electronic engineering Spintronics Other nanotechnology Techniques and instrumentation