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On the frequency and field linewidth conversion of ferromagnetic resonance spectra
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
2015 (English)In: Journal of Physics D: Applied Physics, ISSN 0022-3727, E-ISSN 1361-6463, Vol. 48, no 33, 335005Article in journal (Refereed) Published
Abstract [en]

Both frequency swept and field swept ferromagnetic resonance measurements have been carried out for a number of different samples with negligible, moderate and significant extrinsic frequency independent linewidth contribution to analyze the correlation between the experimentally measured frequency and field linewidths. Contrary to the belief commonly held by many researchers, it is found that the frequency and field linewidth conversion relation does not hold for all cases. Instead it holds only for samples with negligible frequency independent linewidth contributions. For samples with non-negligible frequency independent linewidth contribution, the field linewidth values converted from the measured frequency linewidth are larger than the experimentally measured field linewidth. A close examination of the literature reveals that previously reported results support our findings, with successful conversions related to samples with negligible frequency independent linewidth contributions and unsuccessful conversions related to samples with significant frequency independent linewidth. The findings are important in providing guidance in ferromagnetic resonance linewidth conversions.

Place, publisher, year, edition, pages
2015. Vol. 48, no 33, 335005
Keyword [en]
ferromagnetic resonance, linewidth, Gilbert damping
National Category
Physical Sciences Engineering and Technology
Identifiers
URN: urn:nbn:se:uu:diva-261949DOI: 10.1088/0022-3727/48/33/335005ISI: 000359276800006OAI: oai:DiVA.org:uu-261949DiVA: diva2:856391
Funder
Knut and Alice Wallenberg Foundation
Available from: 2015-09-24 Created: 2015-09-07 Last updated: 2017-12-01Bibliographically approved

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Wei, YajunSvedlindh, Peter

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