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Träfflista för sökning "WFRF:(Roelfsema P.) srt2:(2010-2014)"

Search: WFRF:(Roelfsema P.) > (2010-2014)

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  • Montoya, Eric, et al. (author)
  • Broadband ferromagnetic resonance system and methods for ultrathin magnetic films
  • 2014
  • In: Journal of Magnetism and Magnetic Materials. - : Elsevier BV. - 0304-8853 .- 1873-4766. ; 356, s. 12-20
  • Journal article (peer-reviewed)abstract
    • Spintronics requires the development, of magnetic thin film structures having a wide range of magnetic properties. Ferromagnetic resonance (FMR) is a well understood experimental technique that has proven to be an invaluable tool to probe the static and dynamic magnetic properties of ultrathin films, multilayer nanostructures, and super lattices. In order to achieve a full characterization of thin film materials, one Reeds to carry out FMR measurements at a wide range of microwave frequencies. In this paper, we show that one does not have to use a broadband vector network analyzer; similar performance can be achieved by using a broadband microwave signal generator, a coplanar waveguide, and a broadband microwave detector. To obtain a good signal to noise ratio, one needs to employ a modulation technique in order to use lock-in detection; in this paper, we use low frequency external field modulation (105 Hz) and microwave power amplitude pulse modulation (10 kHz). The sensitivity and he performance of this broadband microwave system is demonstrated on two types of samples: molecular beam epitaxy grown single crystal GaAs(001)/Fe/Au and sputter deposit:cc! textured Si(111)/Ta/Ru/Co/Ru superlattice structures. The samples were mounted on a coplanar waveguide, allowing one a broadband measurement, similar to 0.1-50 GHz, of DC field swept FMR signals. The results are compared to traditional field swept, field modulated measurements in microwave cavity resonators. Despite the fact that the FMR signal can be very different from that obtained by standard microwave cavities, we show that the analysis of the FMR signal is fairly simple using an admixture of the in-phase and out-of-phase components of rf susceptibility and that the resulting fitted magnetic parameters are in excellent agreement. Additionally, we demonstrate that microwave power amplitude pulse modulation can be used to greatly speed up data collection times, especially for very weak and broad FMR signals.
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  • Mars, Annette (author)
  • Elevens då och nu
  • 2013
  • In: Perspektiv på praktiknära musikpedagogisk forskning. - Luleå : Luleå tekniska universitet. - 9789174397482 - 9789174397499 ; , s. 79-101
  • Book chapter (pop. science, debate, etc.)
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  • DeCal, Emma, et al. (author)
  • Kat i Sverige - en kartläggning av katanvändning i Göteborg, Stockholm och Malmö. 2009.
  • 2009
  • In: Folkhälsoinstitutet och Socialmedicin.
  • Journal article (other academic/artistic)abstract
    • Kartläggning av Katanvändning i Stockholm, Malmö och Göteborg 2008. Resultat: Katanvändningens omfattning kunde ej fastställas med använd teknik som omfattade Key INformant teknik, enkäten i lokalafolkgrupper, skolor och via webben. Materialet insamlades med enkäter översatta till somaliska och tigreiska. Försök gjordes att nå somalier, etioper och eritreaner. Viss spridning av katanvändning kunde bland ungdomar ses till andra grupper. De som som svarade upplevde att katanvändningen medförde problem; det tyckte framför allt personer som ej själva var användare. Svårigheter i data insamlingen berodde fr.a på föregående negativa skriverier i dagspressen.
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  • Result 1-10 of 14
Type of publication
journal article (6)
conference paper (4)
reports (2)
other publication (1)
book chapter (1)
Type of content
peer-reviewed (7)
other academic/artistic (5)
pop. science, debate, etc. (2)
Author/Editor
de Jong, Johnny (2)
Almkvist, Ove (1)
Stern, A. (1)
Osman, Fatumo (1)
Ots, Mart (1)
Schüz, Joachim (1)
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Johansson, SGO (1)
Tettamanti, Giorgio (1)
Johansen, Christoffe ... (1)
Feychting, Maria (1)
Ahlbom, Anders (1)
Akselsson, Cecilia (1)
Zamani, Atieh (1)
Hillert, Lena (1)
Löfgren, Stefan (1)
Åkerstedt, Torbjörn (1)
Långström, Bengt (1)
Olsson, Bengt (1)
Vermeulen, Roel (1)
Spak, Fredrik, 1948 (1)
Nordberg, Agneta (1)
Rodriguez-Vieitez, E ... (1)
Thordardottir, Stein ... (1)
Graff, Caroline (1)
Wall, Anders (1)
Carter, Stephen F. (1)
Auvinen, Anssi (1)
Renne, T (1)
Gerhardt, Karin (1)
Elliott, Paul (1)
Schöll, Michael, 198 ... (1)
Waluszewski, Alexand ... (1)
Egnell, Gustaf (1)
Jafari, Hamid (1)
Ericsson, Anders (1)
Wuthrich, B (1)
Bohman, Anders (1)
Mars, Annette (1)
Chiotis, Konstantino ... (1)
Saint-Aubert, Laure (1)
Ten Cate, H (1)
Deltour, Isabelle (1)
de Goër de Herve, Ma ... (1)
Kromhout, Hans (1)
DeCal, Emma (1)
van Schilfgaarde, M. (1)
Farid, Karim (1)
Gerholm, Tove (1)
Girt, Erol (1)
Hartmann, Benjamin J ... (1)
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University
Karolinska Institutet (3)
University of Gothenburg (2)
Uppsala University (2)
Stockholm University (2)
Swedish University of Agricultural Sciences (2)
Luleå University of Technology (1)
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Halmstad University (1)
Jönköping University (1)
Lund University (1)
Karlstad University (1)
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Language
English (14)
Research subject (UKÄ/SCB)
Natural sciences (13)

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