Dresden 2006 – wissenschaftliches Programm
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MA: Magnetismus
MA 14: Magnetic Thin Films II
MA 14.7: Vortrag
Dienstag, 28. März 2006, 11:45–12:00, HSZ 03
Extrinsic and intrinsic properties of epitaxial Pr-Co films — •Ajit Patra, Volker Neu, Sebastian Fähler, and Ludwig Schultz — IFW Dresden, Institute for Metallic Materials, P.O. Box 01171, Dresden, Germany
Detailed investigations of the effect of deposition temperature for Cr buffer (TB) and Pr-Co layer (TD) on the phase formation, textured growth and magnetic properties of epitaxial Pr-Co films are performed by X-ray diffraction (XRD), pole figure measurements and vibrating sample magnetometry (VSM), respectively. Films have been prepared by pulsed laser deposition (PLD) on Cr buffered MgO (100) substrate. Unlike the buffer deposition temperature, the Pr-Co deposition temperature has a large influence on the structure and magnetic properties of the Pr-Co films. For the extreme temperatures, i.e. 300 ∘C and 700 ∘C, no Pr-Co phase formation is observed. However films prepared between 300 ∘C and 700 ∘C develop a hexagonal Pr-Co phase and grow epitaxially on MgO substrate. Due to the four fold symmetry of the MgO(100) substrate, the c axis is found to be along both, the MgO[010] and MgO[001] direction, which is also confirmed by magnetic measurements. Optimum magnetic properties, µ0Hc ≈ 2.24 T, JR ≈ 1.01 T, (JR / JS) ≈ 0.84 and magnetic texture (JRhard axis/JReasy axis≈ 0.04) have been obtained for films deposited at 600 ∘C.