Aluminum compounds CaCu3Ti4O12 Calcium compounds Colossal dielectric constant Colossal dielectric constant and sol-gel Copper compounds Crystal orientation Dielectric effects Film crystallinity Film growth Gallium compounds Highly-oriented CaCu 3 Ti 4 O 12 films LaAlO 3 substrate Lanthanum compounds Lattice mismatch NdGaO 3 substrate NdGaO3 substrates Neodymium compounds Preferential orientation Preferred orientations Single crystal substrates Single crystals Sol-gel process Sol-gels Substrates Thin films Titanium compounds X ray diffraction