Magnetization dynamics in La0.67Ca0.33MnO3 epitaxial films probed with resonant and non-resonant microwave absorption
| Autor: | Rajendra Pant, Rajni Porwal, R. C. Budhani |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Magnetization dynamics
Materials science Magnetoresistance Condensed matter physics Magnetism General Physics and Astronomy Condensed Matter::Materials Science Magnetization Ferromagnetism Spin wave Condensed Matter::Superconductivity Curie temperature Condensed Matter::Strongly Correlated Electrons Absorption (electromagnetic radiation) |
| Zdroj: | Journal of Applied Physics. 117:013904 |
| ISSN: | 1089-7550 0021-8979 |
| Popis: | Temperature (T) dependent microwave absorption measurements are performed on La0.67Ca0.33MnO3 (LCMO) epitaxial thin films of thickness 100 and 200 nm in an electron paramagnetic resonance spectrometer operating in X-band. The resonant absorption peak is monitored for out-of-plane ( H⊥) and in-plane ( H∥) dc magnetic field ( H) as the system goes through magnetic ordering. These data suggest a resilient transformation to the ferromagnetic (FM) phase in the vicinity of the Curie temperature (TC), indicative of a phase separation, which is dominant in the thinner film. The saturation magnetization is calculated from SQUID magnetometry on the same film. A pronounced zero-field absorption is seen in H∥ geometry displaying anomalous growth in 100 nm film at T |
| Databáze: | OpenAIRE |
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