Current driven domain wall depinning in notched Permalloy nanowires

Candra Kurniawan, Dede Djuhana

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Citations (Scopus)

Abstract

In this work, we have investigated the domain wall (DW) depinning behavior in the notched nanowire by a micromagnetic simulation. A transverse domain wall (TW) was initially positioned at the center of notch and 1 ns length current pulse was applied to depin the DW with respect to the notch size s and the wire width variation. We have observed the depinning current density Jd which was a minimum current to escape DW from the notch. It was found that the depinning current density decreased as the wire width and the notch size increased. In the depinning process, we observed the inner structure of DW generally transformed from TW to anti-vortex wall (AVW). Interestingly, for the case of s less than 70 nm, AVW formed and depinned closely to the period when current pulse was active, while for s larger than 70 nm, AVW formed until the current pulse went to zero and then depinned after flipped TW was formed. It can be explained that the transformation of DW inner structures were affected by the spin torque energy and contributed to DW depinning behavior from the notched nanowires.

Original languageEnglish
Title of host publicationInternational Symposium on Frontier of Applied Physics, ISFAP 2015
Editors Isnaeni, Andrivo Rusydi, Febty Febriani, Muhammad Danang Birowosuto, Yuliati Herbani, Toto Sudiro, Hubby Izzuddin, Dedy H. B. Wicaksono, Ferensa Oemry, Titi Anggono
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735413580
DOIs
Publication statusPublished - 12 Feb 2016
EventInternational Symposium on Frontier of Applied Physics, ISFAP 2015 - Bandung, West Java, Indonesia
Duration: 5 Oct 20157 Oct 2015

Publication series

NameAIP Conference Proceedings
Volume1711
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

ConferenceInternational Symposium on Frontier of Applied Physics, ISFAP 2015
Country/TerritoryIndonesia
CityBandung, West Java
Period5/10/157/10/15

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