The crystal structures, magnetizations, and magnetotransport properties of SrRuO3 (SRO) films grown on SrTiO3 (STO) substrates are studied. The crystal structures of SRO films show a -oriented and a -oriented epitaxially growth for films deposited on the STO(001) and STO(110) substrates, respectively. The low-temperature magnetization follows the Bloch law both for the SROoriented and SRO oriented films, while the magnetization near TC follows the scaling law, M ∝ (TC-T)α, with α = 0.43 and 0.34 for SROoriented and SROoriented films, respectively, indicating the nature of magnetic anisotropy in SRO. Furthermore, a crossover from a T2 to a T1.5 temperature dependence of resistivity corresponding to the Fermi-liquid to non-Fermi-liquid crossover at around 30-40 K has been observed both in the SRO oriented and SROoriented films. In the paramagnetic regime, the magnetoresistance shows a strong H2 dependence at the low-field region. These results will be discussed within existing theoretical frames and lead to the conclusion that the fluctuation-induced strongly correlative electrons dominate the non-Fermi-liquid transport properties from the ferromagnetic regime to the paramagnetic regime.
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|Publication status||Published - 2004 Jul 1|
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics