Abstract
We investigate the electrical resistivity of the ferromagnetic granular thin films TM-Al-O (TM = Fe, Co). The resistivity shows T 2behavior at low temperatures in all metallic samples. This strongly suggests scattering of conduction electrons by thermally excited ferromagnetic spin waves. Logarithmic Kondo like behavior (mdashlog T) in the resistivity and negative magnetoresistivity at low temperatures are observed. With decreasing concentration of transition metal, both the coefficients of the T 2and log T terms increase.
| Original language | English |
|---|---|
| Article number | 074708 |
| Journal | Journal of the Physical Society of Japan |
| Volume | 78 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - 2009 Jul 1 |
Keywords
- Co-Al-O
- Electrical resistivity
- Fe-Al-O
- Ferromagnetic order
- Granular film
- Kondo like behavior
- Magnetoresistivity
- Magnon scattering
- Spin wave
- Transition metal
ASJC Scopus subject areas
- Physics and Astronomy(all)
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Nakamura, S., Nojima, T., Yoshihara, A., Ohnuma, S., & Fujimori, H. (2009). Electrical resistivity in ferromagnetic TM-Al-O (TM = Fe, Co) granular films: scattering by spin waves and kondo like behavior. Journal of the Physical Society of Japan, 78(7), [074708]. https://doi.org/10.1143/JPSJ.78.074708