Figure 3.

(a) Resistivity (ρ) of a 65 nm-thick Sr(Nb_0.2Ti_0.8)O₃ film as a function of temperature (T) with varying magnetic field (B), (b) Temperature at the resistance minimum (T_min) as a function of B, (c,d) the current (I)-voltage (V) characteristic curve with varying B at 2 K and 10 K, respectively. (e) ln(ρ) vs. (1/T)^1/4 curves under various magnetic field. Solid lines are linear fitting to each curve below the T_min. (f) ΔR/R(0)² as a function of B at 2 K (replotted from Fig. 2(b)). A red solid line is the fitting curve by Fukuyama-Hoshino model (see the text) with the fitting parameters, B_ϕ = 0.112 T and B_SO = 5.618 T.