Dresden 2006 – scientific programme

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MA: Magnetismus

MA 14: Magnetic Thin Films II

MA 14.1: Talk

Tuesday, March 28, 2006, 10:15–10:30, HSZ 03

Thin epitaxial films of the Heusler compound Co₂FeSi — •Horst Schneider¹, Sabine Wurmehl², Gerhard Jakob¹, Claudia Felser², and Hermann Adrian¹ — ¹Institut für Physik, Universität Mainz, Staudinger Weg 7, 55128 Mainz, Germany — ²Institut für Anorganische Chemie und Analytische Chemie, Universität Mainz, Staudinger Weg 9, 55128 Mainz, Germany

Bulk samples of the Heusler compound Co₂FeSi (CFS) possess a high Curie temperature of 1100 K. An integer magnetic moment of 6 µ_B/fu suggests halfmetalicity. By using pulsed laser deposition in UHV as well as RF sputtering we prepared thin CFS films on Al₂O₃ (1120) and MgO (100). X-ray analysis reveals that these films grow (110)-oriented on sapphire or (100)-oriented on MgO. They exhibit the fully ordered L2₁ structure. Magnetic properties were investigated by VSM- and SQUID-measurements, electronic properties by transport measurements. AFM and SEM allowed the analysis of the films’ surfaces.