{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,7,30]],"date-time":"2025-07-30T11:01:32Z","timestamp":1753873292898,"version":"3.41.2"},"reference-count":43,"publisher":"AIP Publishing","issue":"2","content-domain":{"domain":["pubs.aip.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2013,7,14]]},"abstract":"<jats:p>We use the resonant and non-resonant microwave absorption to probe the dynamic and static magnetic parameters of weakly coupled spin valves. The sample series include spin valve structures with varying thickness of the non-magnetic metallic spacer and reference samples comprised only a free or fixed magnetic layer. Beside the common resonance absorption peaks, the observed microwave spectra present step-like features with hysteretic behavior. The latter effect is a direct manifestation of the interlayer coupling between the ferromagnetic layers and provides two static magnetic parameters, the switching field and coercivity of the fixed layer. The analysis of the microwave absorption spectra under in-plane rotation of the applied magnetic field at different spacer thicknesses permits a deeper insight in the magnetic interactions in this system as compared to the conventional magnetometry. We combine the standard Smit-Beljers formalism for the angular dependence of the resonance fields with a Landau-Lifshitz-Gilbert dynamics extended to describe in detail the intensity of microwave absorption in the spin valves. In this way, we extract a set of parameters for each layer including the effective magnetization and anisotropy, exchange bias and interlayer coupling, as well as Gilbert damping. The model reproduces well the experimental findings, both qualitatively and quantitatively, and the estimated parameters are in a reasonable agreement with the values known from the literature. The proposed theoretical treatment can be adopted for other multilayered dynamic systems as, e.g., spin-torque oscillators.<\/jats:p>","DOI":"10.1063\/1.4813449","type":"journal-article","created":{"date-parts":[[2013,7,11]],"date-time":"2013-07-11T22:13:40Z","timestamp":1373580820000},"update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":2,"title":["Resonant and non-resonant microwave absorption as a probe of the magnetic dynamics and switching in spin valves"],"prefix":"10.1063","volume":"114","author":[{"given":"A. A.","family":"Timopheev","sequence":"first","affiliation":[{"name":"Departamento de F\u00edsica and I3N, Universidade de Aveiro 1 , 3810-193 Aveiro, Portugal"}]},{"given":"N. A.","family":"Sobolev","sequence":"additional","affiliation":[{"name":"Departamento de F\u00edsica and I3N, Universidade de Aveiro 1 , 3810-193 Aveiro, Portugal"}]},{"given":"Y. G.","family":"Pogorelov","sequence":"additional","affiliation":[{"name":"IFIMUP and IN-Institute of Nanoscience and Nanotechnology, Departamento de F\u00edsica e Astronomia, Universidade do Porto 2 , 4169-007 Porto, Portugal"}]},{"given":"A. V.","family":"Talalaevskij","sequence":"additional","affiliation":[{"name":"IFIMUP and IN-Institute of Nanoscience and Nanotechnology, Departamento de F\u00edsica e Astronomia, Universidade do Porto 2 , 4169-007 Porto, Portugal"}]},{"given":"J. M.","family":"Teixeira","sequence":"additional","affiliation":[{"name":"IFIMUP and IN-Institute of Nanoscience and Nanotechnology, Departamento de F\u00edsica e Astronomia, Universidade do Porto 2 , 4169-007 Porto, Portugal"}]},{"given":"S.","family":"Cardoso","sequence":"additional","affiliation":[{"name":"INESC-MN and IN-Institute of Nanoscience and Nanotechnology 3 , 1000-029 Lisbon, Portugal"}]},{"given":"P. P.","family":"Freitas","sequence":"additional","affiliation":[{"name":"INESC-MN and IN-Institute of Nanoscience and Nanotechnology 3 , 1000-029 Lisbon, Portugal"}]},{"given":"G. N.","family":"Kakazei","sequence":"additional","affiliation":[{"name":"IFIMUP and IN-Institute of Nanoscience and Nanotechnology, Departamento de F\u00edsica e Astronomia, Universidade do Porto 2 , 4169-007 Porto, Portugal"},{"name":"Institute of Magnetism, NAS of Ukraine 4 , 03142 Kiev, Ukraine"}]}],"member":"317","published-online":{"date-parts":[[2013,7,11]]},"reference":[{"key":"2023070504020442800_c1","doi-asserted-by":"publisher","first-page":"3206","DOI":"10.1109\/20.490329","volume":"31","year":"1995","journal-title":"IEEE Trans. Magn."},{"key":"2023070504020442800_c2","doi-asserted-by":"publisher","first-page":"316","DOI":"10.1109\/20.312279","volume":"30","year":"1994","journal-title":"IEEE Trans. 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