Berlin 2012 – scientific programme

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MA: Fachverband Magnetismus

MA 38: MagneticThin Films I

MA 38.1: Talk

Thursday, March 29, 2012, 09:30–09:45, H 0112

Tailored Magnetic Anisotropy in Amorphous Co₆₈Fe₂₄Zr₈ Thin Films — •Yu Fu¹, Igor Barsukov¹, Hossein Raanaei², Marina Spasova¹, Jürgen Lindner¹, Ralf Meckenstock¹, Björgvin Hjörvarsson², and Michael Farle¹ — ¹Fakultät für Physik and CeNIDE, Universität Duisburg-Essen, Duisburg, Germany — ²Department of Physics and Astronomy, Uppsala University, Uppsala, Sweden

Amorphous magnetic thin films are good candidates for designing new spintronic devices, due to their lack of inhomogeneity caused by crystalline defects or lattice strain at the interfaces. An amorphous Co₆₈Fe₂₄Zr₈(3 nm)/Al₇₀Zr₃₀(3 nm)/Co₆₈Fe₂₄Zr₈(3 nm) trilayer structure was investigated using in-plane and out-of-plane angular dependent ferromagnetic resonance at different frequencies. By deconvoluting the resonance lines and fitting the angular dependences of the resonance field, it was proved that the uniaxial magnetic anisotropy of each Co₆₈Fe₂₄Zr₈ layer can be tailored independently and arbitrarily by applying an external magnetic field during film deposition. The magnetic anisotropy constants of the Co₆₈Fe₂₄Zr₈ layers are nearly identical. Furthermore, the magnetic layers act independently upon each other due to the absence of interlayer coupling. This work was supported by the Deutsche Forschungsgemeinschaft (DFG), SFB 491 and the Swedish Research Council.