Performance of synthetic antiferromagnetic racetrack memory: domain wall versus skyrmion

Handle URI:
http://hdl.handle.net/10754/625626
Title:
Performance of synthetic antiferromagnetic racetrack memory: domain wall versus skyrmion
Authors:
Tomasello, R ( 0000-0002-9218-5633 ) ; Puliafito, V ( 0000-0003-4438-538X ) ; Martinez, E; Manchon, Aurelien ( 0000-0002-4768-293X ) ; Ricci, M; Carpentieri, M; Finocchio, G ( 0000-0002-1043-3876 )
Abstract:
A storage scheme based on racetrack memory, where the information can be coded in a domain or a skyrmion, seems to be an alternative to conventional hard disk drive for high density storage. Here, we perform a full micromagnetic study of the performance of synthetic antiferromagnetic (SAF) racetrack memory in terms of velocity and sensitivity to defects by using experimental parameters. We find that, to stabilize a SAF skyrmion, the Dzyaloshinskii–Moriya interaction in the top and the bottom ferromagnet should have an opposite sign. The velocity of SAF skyrmions and SAF Néel domain walls are of the same order and can reach values larger than 1200 m s−1 if a spin–orbit torque from the spin-Hall effect with opposite sign is applied to both ferromagnets. The presence of disordered anisotropy in the form of randomly distributed grains introduces a threshold current for both SAF skyrmions and SAF domain walls motions.
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Citation:
Tomasello R, Puliafito V, Martinez E, Manchon A, Ricci M, et al. (2017) Performance of synthetic antiferromagnetic racetrack memory: domain wall versus skyrmion. Journal of Physics D: Applied Physics 50: 325302. Available: http://dx.doi.org/10.1088/1361-6463/aa7a98.
Publisher:
IOP Publishing
Journal:
Journal of Physics D: Applied Physics
Issue Date:
20-Jun-2017
DOI:
10.1088/1361-6463/aa7a98
Type:
Article
ISSN:
0022-3727; 1361-6463
Sponsors:
The authors acknowledge the executive programme of scientific and technological cooperation between Italy and China for the years 2016–2018 (code CN16GR09) title 'Nanoscale broadband spin-transfer-torque microwave detector' funded by Ministero degli Affari Esteri e della Cooperazione Internazionale. RT and MR also acknowledge Fondazione Carit—Projects—'Sistemi Phased-Array Ultrasonori', and 'Sensori Spintronici'. The work by EM was supported by project WALL, FP7-PEOPLE-2013-ITN 608031 from European Commission, project MAT2014-52477-C5-4-P from Spanish government, and project SA282U14 from Junta de Castilla y Leon. AM acknowledges support from the King Abdullah University of Science and Technology (KAUST). The authors acknowledge André Thiaville for very useful discussions.
Additional Links:
http://iopscience.iop.org/article/10.1088/1361-6463/aa7a98/meta
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorTomasello, Ren
dc.contributor.authorPuliafito, Ven
dc.contributor.authorMartinez, Een
dc.contributor.authorManchon, Aurelienen
dc.contributor.authorRicci, Men
dc.contributor.authorCarpentieri, Men
dc.contributor.authorFinocchio, Gen
dc.date.accessioned2017-10-03T12:49:30Z-
dc.date.available2017-10-03T12:49:30Z-
dc.date.issued2017-06-20en
dc.identifier.citationTomasello R, Puliafito V, Martinez E, Manchon A, Ricci M, et al. (2017) Performance of synthetic antiferromagnetic racetrack memory: domain wall versus skyrmion. Journal of Physics D: Applied Physics 50: 325302. Available: http://dx.doi.org/10.1088/1361-6463/aa7a98.en
dc.identifier.issn0022-3727en
dc.identifier.issn1361-6463en
dc.identifier.doi10.1088/1361-6463/aa7a98en
dc.identifier.urihttp://hdl.handle.net/10754/625626-
dc.description.abstractA storage scheme based on racetrack memory, where the information can be coded in a domain or a skyrmion, seems to be an alternative to conventional hard disk drive for high density storage. Here, we perform a full micromagnetic study of the performance of synthetic antiferromagnetic (SAF) racetrack memory in terms of velocity and sensitivity to defects by using experimental parameters. We find that, to stabilize a SAF skyrmion, the Dzyaloshinskii–Moriya interaction in the top and the bottom ferromagnet should have an opposite sign. The velocity of SAF skyrmions and SAF Néel domain walls are of the same order and can reach values larger than 1200 m s−1 if a spin–orbit torque from the spin-Hall effect with opposite sign is applied to both ferromagnets. The presence of disordered anisotropy in the form of randomly distributed grains introduces a threshold current for both SAF skyrmions and SAF domain walls motions.en
dc.description.sponsorshipThe authors acknowledge the executive programme of scientific and technological cooperation between Italy and China for the years 2016–2018 (code CN16GR09) title 'Nanoscale broadband spin-transfer-torque microwave detector' funded by Ministero degli Affari Esteri e della Cooperazione Internazionale. RT and MR also acknowledge Fondazione Carit—Projects—'Sistemi Phased-Array Ultrasonori', and 'Sensori Spintronici'. The work by EM was supported by project WALL, FP7-PEOPLE-2013-ITN 608031 from European Commission, project MAT2014-52477-C5-4-P from Spanish government, and project SA282U14 from Junta de Castilla y Leon. AM acknowledges support from the King Abdullah University of Science and Technology (KAUST). The authors acknowledge André Thiaville for very useful discussions.en
dc.publisherIOP Publishingen
dc.relation.urlhttp://iopscience.iop.org/article/10.1088/1361-6463/aa7a98/metaen
dc.rightsThis is an author-created, un-copyedited version of an article accepted for publication/published in Journal of Physics D: Applied Physics. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at http://doi.org/10.1088/1361-6463/aa7a98en
dc.subjectmicromagnetismen
dc.subjectspintronicsen
dc.subjectracetrack memoryen
dc.subjectdomain wallen
dc.subjectskyrmionen
dc.subjectDzyaloshinskii–Moriya interactionen
dc.subjectspin-Hall effecten
dc.titlePerformance of synthetic antiferromagnetic racetrack memory: domain wall versus skyrmionen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalJournal of Physics D: Applied Physicsen
dc.eprint.versionPost-printen
dc.contributor.institutionDepartment of Engineering, Polo Scientifico e Didattico di Terni, University of Perugia, strada di Pentima Bassa, I-05100 Terni, Italyen
dc.contributor.institutionDepartment of Engineering, University of Messina, C.da di Dio, I-98166, Messina, Italyen
dc.contributor.institutionDepartment of Fisica Aplicada, Universidad de Salamanca, Plaza de los Caidos s/n, E-38008, Salamanca, Spainen
dc.contributor.institutionDepartment of Computer Science, Modelling, Electronics and System Science, University of Calabria, via P. Bucci, I-87036 Rende (CS), Italyen
dc.contributor.institutionDepartment of Electrical and Information Engineering, Politecnico di Bari, via E. Orabona 4, I-70125 Bari, Italyen
dc.contributor.institutionDepartment of Mathematical and Computer Sciences, Physical Sciences and Earth Sciences, University of Messina, V.le F. D'alcontres, 31, I-98166, Messina, Italyen
kaust.authorManchon, Aurelienen
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