In this study, CaMnO$_3$/La$_{0.7}$Ca$_{0.3}$MnO$_3$/CaMnO$_3$ heterostructures were deposited on (100) SrTiO$_3$ substrates with the optimal conditions for single layers of CaMnO$_3$ and La$_{0.7}$Ca$_{0.3}$MnO$_3$ via the pulsed laser deposition (PLD) technique. We performed X-ray diffraction (XRD), atomic force microscopy (AFM), and resistivity measurements to investigate the crystallinity, morphology and electrical properties of these heterostructures. All heterostructures showed homogeneous and uniform morphologies with small RMS roughnesses. The heterostructures exhibited a metallic behavior when the thickness of the bottom CaMnO$_3$ (CMO) layer was small and the thickness of the La$_{0.7}$Ca$_{0.3}$MnO$_3$ (LCMO) layer was between 10 and 30 nm.

Keywords: Manganites, Heterostructures, Resistivity, Magnetism, PLD