Magnetoresistance of Polycrystalline La0.7Ca0.3MnO3Films in a Microwave Magnetic Field
| Autor: | A. Maneikis, Ž. Kancleris, R. Butkutė, A. Lučun, Jonas Gradauskas, F. Anisimovas, Oleg Kiprijanovič, Algirdas Sužiedėlis, Bonifacas Vengalis, S. Ašmontas |
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| Rok vydání: | 2007 |
| Předmět: |
Physics
Waveguide (electromagnetism) Field (physics) Condensed matter physics Magnetoresistance General Physics and Astronomy Magnetic field Condensed Matter::Materials Science Amplitude Electrical resistance and conductance Condensed Matter::Superconductivity Condensed Matter::Strongly Correlated Electrons Wave vector Microwave |
| Zdroj: | Acta Physica Polonica A. 111:147-152 |
| ISSN: | 1898-794X 0587-4246 |
| DOI: | 10.12693/aphyspola.111.147 |
| Popis: | We present new experimental evidence indicating the importance of magnetic field component of microwave field (f = 9.4 GHz) for magnetoresistive properties of polycrystalline La0.7Ca0.3MnO3 films. The microwave measurements revealed a different character of the temperature-dependent electrical resistance of polycrystalline La0.7Ca0.3MnO3 films placed in the centre (maximal amplitude of H10 wave vector) and at a narrow wall of the waveguide (reduced H10 amplitude). Theoretical estimations of the influence of substrate onto distribution of microwave electric and magnetic fields in the waveguide were performed using the finite-difference time-domain method. |
| Databáze: | OpenAIRE |
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