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Observation of magnetic droplets in magnetic tunnel junctions
Beihang Univ, Sch Integrated Circuit Sci & Engn, Fert Beijing Inst, MIIT Key Lab Spintron, Beijing 100191, Peoples R China..
Beihang Univ, Sch Integrated Circuit Sci & Engn, Fert Beijing Inst, MIIT Key Lab Spintron, Beijing 100191, Peoples R China..
KTH, School of Engineering Sciences (SCI), Applied Physics. Univ Gothenburg, Dept Phys, S-41296 Gothenburg, Sweden. ;Northwestern Polytech Univ, Sch Microelect, Xian 710072, Peoples R China..ORCID iD: 0000-0003-0642-8203
Beihang Univ, Sch Integrated Circuit Sci & Engn, Fert Beijing Inst, MIIT Key Lab Spintron, Beijing 100191, Peoples R China..
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2022 (English)In: Science China Physics, Mechanics & Astronomy, ISSN 1674-7348, E-ISSN 1869-1927, Vol. 65, no 2, article id 227511Article in journal (Refereed) Published
Abstract [en]

Magnetic droplets, a class of highly nonlinear magnetodynamic solitons, can be nucleated and stabilized in nanocontact spin-torque nano-oscillators. Here we experimentally demonstrate magnetic droplets in magnetic tunnel junctions (MTJs). The droplet nucleation is accompanied by power enhancement compared with its ferromagnetic resonance modes. The nucleation and stabilization of droplets are ascribed to the double-CoFeB free-layer structure in the all-perpendicular MTJ, which provides a low Zhang-Li torque and a high pinning field. Our results enable better electrical sensitivity in fundamental studies of droplets and show that the droplets can be utilized in MTJ-based applications and materials science.

Place, publisher, year, edition, pages
Springer Nature , 2022. Vol. 65, no 2, article id 227511
Keywords [en]
spin-torque nano-oscillators, magnetic droplets, spin dynamics, magnetic tunnel junctions
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:kth:diva-307557DOI: 10.1007/s11433-021-1794-4ISI: 000742001900003Scopus ID: 2-s2.0-85122918641OAI: oai:DiVA.org:kth-307557DiVA, id: diva2:1633527
Note

QC 20220131

Available from: 2022-01-31 Created: 2022-01-31 Last updated: 2023-12-07Bibliographically approved

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Jiang, ShengÅkerman, Johan

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