Anomalous magnetotransport in SrRuO3 films: A crossover from Fermi-liquid to non-Fermi-liquid behavior

L. M. Wang, Herng-Er Horng, Hong-Chang Yang

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    29 Citations (Scopus)

    Abstract

    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 [110]-oriented and a [010]-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 SRO[110]oriented and SRO[010] oriented films, while the magnetization near TC follows the scaling law, M ∝ (TC-T)α, with α = 0.43 and 0.34 for SRO[110]oriented and SRO[010]oriented 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[110] oriented and SRO[010]oriented 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.

    Original languageEnglish
    Article number014433
    JournalPhysical Review B - Condensed Matter and Materials Physics
    Volume70
    Issue number1
    DOIs
    Publication statusPublished - 2004 Jul 1

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics

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