TY - JOUR
T1 - Anomalous magnetotransport in SrRuO3 films
T2 - A crossover from Fermi-liquid to non-Fermi-liquid behavior
AU - Wang, L. M.
AU - Horng, H. E.
AU - Yang, H. C.
N1 - Funding Information:
The authors thank the National Science Council of the Republic of China for financial support under Grant Nos. NSC 92-2112-M-212-001 and NSC 92-2112-M002-006. This work was also partially supported by the Da-Yeh University under Grant No. ORD-9303 and by the Ministry of Education under the program of promoting university academic excellence.
PY - 2004/7
Y1 - 2004/7
N2 - 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.
AB - 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.
UR - https://www.scopus.com/pages/publications/33745270207
UR - https://www.scopus.com/pages/publications/33745270207#tab=citedBy
U2 - 10.1103/PhysRevB.70.014433
DO - 10.1103/PhysRevB.70.014433
M3 - Article
AN - SCOPUS:33745270207
SN - 0163-1829
VL - 70
SP - 014433-1-014433-7
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
IS - 1
M1 - 014433
ER -