Abstract
The magneto-, electrical- and thermal-transport properties of SrRuO3 (SRO) films have been investigated. The magnetization (M), relative resistivity (Δρ) and relative Seebeck (ΔS) near TC follow a scaling law, M ~ (TC−T)α, ΔρSP ~ (T−T)2β and ΔS ~ (TC−T)2γ, respectively. The values α = 0.394, β = 0.401 and γ = 0.421 for the (001)-SRO thin films are well fitted with mean-field critical exponents. While critical exponent α = 0.365, β = 0.357 and γ = 0.363 for the (111)-SRO thin films belong to Heisenberg ferromagnetic behavior. A T2 temperature dependence of resistivity below 30 K corresponds to a Fermi-liquid state. In the Fermi-liquid regime, the MR(%) =|ρ(H)−ρ(0)|/ρ(0) × 100% and MS(%) =|S(H)−S(0)|/S(0) × 100% are quadratic at low field and almost linear for large field without saturation until 70 kOe. Furthermore, dM/dT, dρ/dT and dS/dT show a linear relationship, indicating the intrinsic electrical-, thermal- and magneto-transport properties are coupled.
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Acknowledgements
This work is supported by the National Natural Science Foundation of China (Grant No. 11604073, 11704095, 52002107), the Nature Science Foundation of Hebei Province (Grant No. A2017201104, E2017201227, No. A2020201010), the Science Foundation of Guizhou Provincial Education Department grant number QJHKYZ[2017]087;the Science Foundation of Guizhou Science and Technology Department grant number QKHJZ[2021]033
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Zhao, G.Q., Chen, L., Ning, X.K. et al. Correlation among magneto-, electrical- and thermal-transport properties in SrRuO3 films. Appl. Phys. A 127, 409 (2021). https://doi.org/10.1007/s00339-021-04575-w
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DOI: https://doi.org/10.1007/s00339-021-04575-w