Thickness and magnetic-field dependence of domain switching in isolated and interacting permalloy contacts

Permalloy (Ni80Fe20) is broadly used to prepare magnetic nanostructures for high-frequency experiments where the magnetization is either excited by electrical currents or magnetic fields. Detailed knowledge of the material properties is mandatory for thorough understanding its magnetization dynamics. In this work, thin Permalloy films are grown by dc-magnetron sputtering on heated substrates and by thermal evaporation with subsequent annealing. The specific resistance is determined by van der Pauw methods. Point-contact Andreev reflection is employed to determine the spin polarization of the films. The topography is imaged by atomic-force microscopy, and the magnetic microstructure by magnetic-force microscopy. Transmission-electron microscopy and transmission-electron diffraction are performed to determine atomic composition, crystal structure, and morphology. From ferromagnetic resonance absorption spectra the saturation magnetization, the anisotropy, and the Gilbert damping parameter are determined. Coercive fields and anisotropy are measured by magneto-optical Kerr magnetometry. The sum of the findings enables optimization of Permalloy for spintronic experiments.

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Structural, magnetic, and transport properties of Permalloy for spintronic experiments

Nahrwold¹,

Scholtyssek²,

Motl-Ziegler³

et al. 2010

Journal of Applied Physics

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Subtractively Prepared Permalloy Nanowires for Spin-Torque Experiments

Nahrwold

Dogan

Bocklage

et al. 2011

J. Phys.: Conf. Ser.

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Magnetotransport through magnetic domain patterns in permalloy rectangles

et al. 2005

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Thickness and magnetic-field dependence of domain switching in isolated and interacting permalloy contacts

Cited by 3 publications

References 33 publications

Structural, magnetic, and transport properties of Permalloy for spintronic experiments

Structural, magnetic, and transport properties of Permalloy for spintronic experiments

Subtractively Prepared Permalloy Nanowires for Spin-Torque Experiments

Magnetotransport through magnetic domain patterns in permalloy rectangles

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