measuring the magnetic and transport properties to get ferromagnetic insulating LCO films. The ferromagnetic ordering temperatures of LCO epitaxial films are reproducible. The dc magnetization of LCO films were measured as functions of temperature and magnetic field. Figures 2(a) shows the temperature dependence of the magnetization for LCO/STO film, which was measured in a magnetic field of $\mu_0$$H$ = 500 Oe applied both parallel to the film surface (in-plane, black line) and perpendicular to the film surface (out-of-plane, red line). Both in-plane and out-of-plane magnetization exhibit a sharp increase at $T_\textup{C} \approx 85$ K, indicating that the LCO/STO film undergoes a FM transition at Curie temperature $T_\textup{C}$, whose value can be obtained from the d$M$/d$T$ \[see inset of Fig. 2(c)\]. The ferromagnetic ground state can be further corroborated by a hysteresis loop in $M(H)$. As shown in Fig. 2(b), both in-plane and out-of-plane magnetization show an obvious saturated hysteresis loop at $T = 2$ K, with the saturation field reaching 30 KOe. Magnetization of LCO film on LAO substrate, measured in a magnetic field of $\mu_0$$H$ = 500 Oe, are presented in Fig. 2(c). In contrast to a sharp FM transition in LCO/STO film, both in-plane and out-of-plane magnetization of 