Dresden 2009 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 11: Magnetic Materials

MA 11.5: Vortrag

Montag, 23. März 2009, 16:15–16:30, HSZ 103

Magnetoresistance and magnetoimpedance measurements on iron whiskers — •Matthäus Langosch, Haibin Gao, and Uwe Hartmann — Institute of Experimental Physics, Saarland University, 66123 Saarbrücken, Germany

Magnetoimpedance (MI) measurements on iron single crystals (iron whiskers) with growing directions <100> and <111> were carried out at room temperature as a function of applied longitudinal magnetic field, current amplitude and frequency. Simultaneous Kerr microscopy was employed to study the magnetic surface domain structure of the samples. Measurements also provide ordinary magneto-resistance (MR) contributions. The contributions of the MI and MR effects were discussed based on the experimental results. The correlation between domain structure and magnetoimpedance effect was studied on the basis of Kerr microscopy images and resistivity data.