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

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

Research output: Contribution to journalArticle

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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