Dresden 2006 – scientific programme
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DS: Dünne Schichten
DS 24: Poster presentation
DS 24.50: Poster
Tuesday, March 28, 2006, 15:00–17:30, P2
Magnetic and transport properties of electrodeposited Fe-Pt thin films — •Violeta Georgescu1, Cristina Sirbu1, and Mihaela Daub2 — 1Faculty of Physics, Al. I. Cuza University, Iasi, Romania — 2Max-Planck-Institute for Microstructure Physics, Halle, Germany
We present a comparative investigation of the surface, structural, magnetic and electric properties of electrodeposited Fe-Pt films in a composition range close to (L12) FePt3 ordered phase. The system of Fe-Pt was chosen because of the No-dqcompetitionNo-dq between ferro- and antiferromagnetism in these alloys, which is favouring the GMR effect. Only a relatively few studies of the magnetic properties of electrodeposited Fe-Pt films exist up to now. The FexPt1−x films, with x=(30-38)% and thickness of 250-300 nm, were electrochemically deposited on Cu (100) textured foils. XRD and AFM showed that the electrodeposited films were nanocrystalline alloys in a disordered or a partially ordered chemical state. By using a torque magnetometer in fields up to 300 kA/m at room temperature, the easy magnetization direction was observed to be perpendicular to the film plane. The magnetoresistance was measured by applying the current perpendicular to the plan (CPP) and the magnetic field perpendicular or parallel to the film plane. For films with x of around 30%, the magnetoresistance was (7.8-11.8)% in CPP geometry, indicating the possibility of interesting technological applications.