Cantilever detected ferromagnetic resonance in thin Fe50Ni50, Co2FeAl0.5Si0.5 and Sr2FeMoO6 films using a double modulation technique
| Autor: | Sabine Wurmehl, P. V. Leksin, Alexey Alfonsov, Fengyuan Yang, Ahmad Omar, Hailong Wang, Eiji Ohmichi, Hitoshi Ohta |
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| Rok vydání: | 2016 |
| Předmět: |
Nuclear and High Energy Physics
Cantilever Materials science Biophysics Analytical chemistry FOS: Physical sciences 02 engineering and technology Low frequency 01 natural sciences Biochemistry Spectral line Magnetization Laser linewidth Condensed Matter - Strongly Correlated Electrons 0103 physical sciences Mesoscale and Nanoscale Physics (cond-mat.mes-hall) 010306 general physics Condensed matter physics Spectrometer Condensed Matter - Mesoscale and Nanoscale Physics Strongly Correlated Electrons (cond-mat.str-el) 021001 nanoscience & nanotechnology Condensed Matter Physics Ferromagnetic resonance 0210 nano-technology Microwave |
| Zdroj: | Journal of magnetic resonance (San Diego, Calif. : 1997). 270 |
| ISSN: | 1096-0856 |
| Popis: | In this work we introduce a new method of a ferromagnetic resonance (FMR) detection from thin, nm-size, films. Our setup is based on the commercial piezo-cantilever, used for atomic force microscopy. It has an option to rotate the sample in the magnetic field and it operates up to the high microwave frequencies of 160 GHz. Using our cantilever based FMR spectrometer we have investigated a set of samples, namely quasi-bulk and 84 nm film Co$_2$FeAl$_{0.5}$Si$_{0.5}$ samples, 16 nm Fe$_{50}$Ni$_{50}$ film and 150 nm Sr$_2$FeMoO$_6$ film. The high frequency ferromagnetic resonance (FMR) response from an extremely thin Fe$_{50}$Ni$_{50}$ film we have fitted with the conventional model for the magnetization dynamics. The cantilever detected FMR experiments on Sr$_2$FeMoO$_6$ film reveal an inability of the conventional model to fit frequency and angular dependences with the same set of parameters, which suggests that one has to take into account much more complicated nature of the magnetization precession in the Sr$_2$FeMoO$_6$ at low temperatures and high frequencies. Moreover, the complicated dynamics of the magnetization apparent in all investigated samples is suggested by a drastic increase of the linewidths with increasing microwave frequency, and by an emergence of the second line with an opposite angular dependence. Comment: Submitted to Journal of Magnetic Resonance |
| Databáze: | OpenAIRE |
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