Preparation of C-axis-oriented CoCrPt Single-crystal Thin Films on Oxide Single-crystal Substrates.

CoCrPt single-crystal thin films were prepared on single-crystal substrates of Al2O3, LaAlO3, and SrTiO3. A good single-crystal of c-axis-oriented CoCr19Pt10 thin film was obtained on an Al2O3(0001) substrate when CoCr19Pt10 film was deposited via a non-magnetic CoCr25Ru25 under layer. Structural analyses were carried out by X-ray diffraction and transmission electron microscopy. The epitaxial relationships between the magnetic layer and the substrate were determined for various oxide substrates. Results demonstate that the substrate and the non-magnetic under layer play important roles for growth of a CoCrPt single-crystal thin film with good crystallographic quality.