Materials Research Bulletin, Vol.37, No.15, 2531-2538, 2002
Fabrication and characterization of heteroepitaxial bilayers of La-Ca-Mn-O/Y-Ba-Cu-O
We have fabricated La0.67Ca0.33MnO3/YBa2Cu3Oy heteroepitaxial bilayers on SrTiO3 (1 0 0) substrates by rf magnetron sputtering. The La0.67Ca0.33MnO3/YBa2Cu3Oy bilayers were characterized by X-ray diffraction, rocking curve measurements, scanning electron microscope and dc four-probe measurements. Both La0.67Ca0.33MnO3 and YBa2Cu3Oy layers show excellent crystallinity indicated. by their sharp and narrow rocking curves. The La0.67Ca0.33MnO3/YBa2Cu3Oy bildyers exhibit a very smooth surface. The relation between the superconducting critical current density of YBa(2)Cu(3)O(y)and temperature was alsoinvestigated. (C) 2002 Elsevier Science Ltd. All rights reserved.