[ABSTRAK
Telah dilakukan penelitian sifat listrik bahan perovskit SrFeO3 dan LaFeO3 padatemperatur tinggi pada kisaran temperatur ruang hingga 250 0C. Sampel disinter950 0C selama 6 jam. Hasil karakterisasi XRD menunjukkan SrFeO3 memilik fasetunggal dan memiliki struktur kristal kubik dengan space grup pm3m dangrainsize 20 nm, dan LaFeO3 memiliki struktur kristal orthorombik dengan spacegrup Pbnm dan grainsize 22 nm. Data impedansi disajikan dalam bentuk nyquistplot dan bode plot yang digunakan untuk mengidentifikasi parameter rangkaianekivalen. Sifat listrik bahan SrFeO3 dan LaFeO3 dapat dideskripsikan denganrangkaian R, RC paralel maupun kombinasi dari keduanya yang menunjukanadanya kontribusi grain dan grain boundary. Energi aktivasi diperoleh darihubungan konduktivitas dc sebagai fungsi temperatur. Energi aktivasi sampelSrFeO3 dan LaFeO3 adalah 0,1817 eV dan 0,0158 eV.

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ABSTRACT
The electrical properties of SrFeO3 and LaFeO3 perovskite materials areinvestigated at high temperatures from room temperature to 250 0C. Samples aresintered at 950 0C for 6 hours. XRD characterization show SrFeO3 has a singlephase and having cubic structure with pm3m space group and grainzise 20 nm.LaFeO3 having orthorombic structure with Pbnm space group and grainsize 22 nm.Impedance data are presented in the nyquist plot and bode plot which is used toidentify an equivalent circuit. The electrical properties of SrFeO3 and LaFeO3perovskite materials can described by R, RC parallel or both combination thatseem a grain and grain boundary. The value of the activation energy which isevaluated from dc conductivity as a function of temperature. The activationenergy of SrFeO3 and LaFeO3 is 0.1817 eV and 0.0158 eV., The electrical properties of SrFeO3 and LaFeO3 perovskite materials areinvestigated at high temperatures from room temperature to 250 0C. Samples aresintered at 950 0C for 6 hours. XRD characterization show SrFeO3 has a singlephase and having cubic structure with pm3m space group and grainzise 20 nm.LaFeO3 having orthorombic structure with Pbnm space group and grainsize 22 nm.Impedance data are presented in the nyquist plot and bode plot which is used toidentify an equivalent circuit. The electrical properties of SrFeO3 and LaFeO3perovskite materials can described by R, RC parallel or both combination thatseem a grain and grain boundary. The value of the activation energy which isevaluated from dc conductivity as a function of temperature. The activationenergy of SrFeO3 and LaFeO3 is 0.1817 eV and 0.0158 eV.]