Crystallographically driven magnetic behaviour of arrays of monocrystalline Co nanowires

Handle URI:
http://hdl.handle.net/10754/563847
Title:
Crystallographically driven magnetic behaviour of arrays of monocrystalline Co nanowires
Authors:
Ivanov, Yu P.; Trabada, Daniel G.; Chuvilin, Andrey L.; Kosel, Jürgen ( 0000-0002-8998-8275 ) ; Chubykalo-Fesenko, Oksana A.; Vázquez., Manuel M.
Abstract:
Cobalt nanowires, 40 nm in diameter and several micrometers long, have been grown by controlled electrodeposition into ordered anodic alumina templates. The hcp crystal symmetry is tuned by a suitable choice of the electrolyte pH (between 3.5 and 6.0) during growth. Systematic high resolution transmission electron microscopy imaging and analysis of the electron diffraction patterns reveals a dependence of crystal orientation from electrolyte pH. The tailored modification of the crystalline signature results in the reorientation of the magnetocrystalline anisotropy and increasing experimental coercivity and squareness with decreasing polar angle of the 'c' growth axis. Micromagnetic modeling of the demagnetization process and its angular dependence is in agreement with the experiment and allows us to establish the change in the character of the magnetization reversal: from quasi-curling to vortex domain wall propagation modes when the crystal 'c' axis tilts more than 75° in respect to the nanowire axis.
KAUST Department:
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division; Electrical Engineering Program; Sensing, Magnetism and Microsystems Lab
Publisher:
IOP Publishing
Journal:
Nanotechnology
Issue Date:
7-Nov-2014
DOI:
10.1088/0957-4484/25/47/475702
Type:
Article
ISSN:
09574484
Sponsors:
Financial support from the Spanish Ministry of Science and Innovation, MCINN, under Project No. MAT2010-20798C05-01 and FIS2010-20979-C02-02 is acknowledged, as well as of the Far Eastern Federal University. A Chuvilin acknowledges the financial support from the Basque Government within the projects CTP11-P14 and Etortek IE11-304. Yu P Ivanov thanks the financial support provided by SABIC. Thanks are due also to C Checa and A Valera for assistance in the SEM characterization.
Appears in Collections:
Articles; Electrical Engineering Program; Sensing, Magnetism and Microsystems Lab; Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorIvanov, Yu P.en
dc.contributor.authorTrabada, Daniel G.en
dc.contributor.authorChuvilin, Andrey L.en
dc.contributor.authorKosel, Jürgenen
dc.contributor.authorChubykalo-Fesenko, Oksana A.en
dc.contributor.authorVázquez., Manuel M.en
dc.date.accessioned2015-08-03T12:16:46Zen
dc.date.available2015-08-03T12:16:46Zen
dc.date.issued2014-11-07en
dc.identifier.issn09574484en
dc.identifier.doi10.1088/0957-4484/25/47/475702en
dc.identifier.urihttp://hdl.handle.net/10754/563847en
dc.description.abstractCobalt nanowires, 40 nm in diameter and several micrometers long, have been grown by controlled electrodeposition into ordered anodic alumina templates. The hcp crystal symmetry is tuned by a suitable choice of the electrolyte pH (between 3.5 and 6.0) during growth. Systematic high resolution transmission electron microscopy imaging and analysis of the electron diffraction patterns reveals a dependence of crystal orientation from electrolyte pH. The tailored modification of the crystalline signature results in the reorientation of the magnetocrystalline anisotropy and increasing experimental coercivity and squareness with decreasing polar angle of the 'c' growth axis. Micromagnetic modeling of the demagnetization process and its angular dependence is in agreement with the experiment and allows us to establish the change in the character of the magnetization reversal: from quasi-curling to vortex domain wall propagation modes when the crystal 'c' axis tilts more than 75° in respect to the nanowire axis.en
dc.description.sponsorshipFinancial support from the Spanish Ministry of Science and Innovation, MCINN, under Project No. MAT2010-20798C05-01 and FIS2010-20979-C02-02 is acknowledged, as well as of the Far Eastern Federal University. A Chuvilin acknowledges the financial support from the Basque Government within the projects CTP11-P14 and Etortek IE11-304. Yu P Ivanov thanks the financial support provided by SABIC. Thanks are due also to C Checa and A Valera for assistance in the SEM characterization.en
dc.publisherIOP Publishingen
dc.subjectelectron microscopyen
dc.subjectmagnetocrystalline anisotropyen
dc.subjectmicromagneticsen
dc.subjectnanowiresen
dc.subjectself-assembled nanostructuresen
dc.subjectsingle crystal cobalten
dc.titleCrystallographically driven magnetic behaviour of arrays of monocrystalline Co nanowiresen
dc.typeArticleen
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Divisionen
dc.contributor.departmentElectrical Engineering Programen
dc.contributor.departmentSensing, Magnetism and Microsystems Laben
dc.identifier.journalNanotechnologyen
dc.contributor.institutionInstitute of Materials Science of Madrid, CSICMadrid, Spainen
dc.contributor.institutionFar Eastern Federal University, 8 Sukhanova St.Vladivostok, Russian Federationen
dc.contributor.institutionCIC NanoGUNE Consolider, Av. de Tolosa 76San-Sebastian, Spainen
dc.contributor.institutionIKERBASQUE, Basque Foundation for ScienceBilbao, Spainen
kaust.authorKosel, Jürgenen
kaust.authorIvanov, Yu P.en
All Items in KAUST are protected by copyright, with all rights reserved, unless otherwise indicated.