Koo, H. C. Gomez, R. D. 2024-01-21T02:03:31Z 2024-01-21T02:03:31Z 2021-09-01 2006-11-11 0304-8853 https://pubs.kist.re.kr/handle/201004/134957 Realization of pulsed-current selectable domain configurations of small permalloy islands is reported. In the islands with 65-100 nm thickness and micron-sized lateral dimensions, the magnetic domain pattern can be uniquely set into either a four or seven closure domain configuration by applying either a positive or negative 10 ns current pulse at the density of 10(7) A/cm(2). The transition is completely reversible. This phenomenon appears to belong to a family of current-induced magnetization reordering, whose main mechanism appears to be domain wall motion due to s-d exchange force directed along the electron flow, and partially influenced by the Amperian field produced at the contact regions. This paper presents two cases, namely, bi-stable and tri-stable configurations, and discusses the mechanism as well as power requirements in using this approach for memory device applications. (C) 2006 Elsevier B.V. All rights reserved. English ELSEVIER WALL Bi-stable and tri-stable Magnetic domain reconfigurations of a small permalloy pattern using current pulses Article 10.1016/j.jmmm.2006.03.027 1 JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, v.306, no.2, pp.272 - 276 JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS 306 2 272 276 scie scopus 000240883500019 2-s2.0-33748312198 Materials Science, Multidisciplinary Physics, Condensed Matter Materials Science Physics Article WALL current pulse domain configuration bi-stable tri-stable