Altmetric

Effect of Meissner screening and trapped magnetic flux on magnetization dynamics in thick Nb/Ni80Fe20/Nb trilayers

File Description SizeFormat 
Meisser Effect_Final Accepted Version_KRJeon.pdfAccepted version1.95 MBAdobe PDFView/Open
Title: Effect of Meissner screening and trapped magnetic flux on magnetization dynamics in thick Nb/Ni80Fe20/Nb trilayers
Authors: Jeon, K-R
Ciccarelli, C
Kurebayashi, H
Cohen, LF
Montiel, X
Eschrig, M
Wagner, T
Komori, S
Srivastava, A
Robinson, JWA
Blamire, MG
Item Type: Journal Article
Abstract: We investigate the influence of Meissner screening and trapped magnetic flux on magnetization dynamics for a Ni80Fe20 film sandwiched between two thick Nb layers (100 nm) using broadband (5–20 GHz) ferromagnetic resonance (FMR) spectroscopy. Below the superconducting transition Tc of Nb, significant zero-frequency line broadening (5–6 mT) and dc-resonance field shift (50 mT) to a low field are both observed if the Nb thickness is comparable to the London penetration depth of Nb films (≥100 nm). We attribute the observed peculiar behaviors to the increased incoherent precession near the Ni80Fe20/Nb interfaces and the effectively focused magnetic flux in the middle Ni80Fe20 caused by strong Meissner screening and (defect-)trapped flux of the thick adjacent Nb layers. This explanation is supported by static magnetic properties of the samples and comparison with FMR data on thick Nb/Ni80Fe20 bilayers. Great care should, therefore, be taken in the analysis of FMR response in ferromagnetic Josephson structures with thick superconductors, a fundamental property for high-frequency device applications of spin-polarized supercurrents.
Issue Date: 30-Jan-2019
Date of Acceptance: 15-Jan-2019
URI: http://hdl.handle.net/10044/1/67141
DOI: https://dx.doi.org/10.1103/PhysRevApplied.11.014061
ISSN: 2331-7019
Publisher: American Physical Society
Journal / Book Title: Physical Review Applied
Volume: 11
Copyright Statement: © 2019 American Physical Society.
Sponsor/Funder: The Leverhulme Trust
Engineering & Physical Science Research Council (E
Funder's Grant Number: RPG-2016-306
RG81276
Keywords: Science & Technology
Physical Sciences
Physics, Applied
Physics
FERROMAGNETIC-RESONANCE
Publication Status: Published
Article Number: ARTN 014061
Appears in Collections:Physics
Experimental Solid State
Faculty of Natural Sciences



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Creative Commons