Regensburg 2010 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 36: TR: Poster Session

TT 36.13: Poster

Donnerstag, 25. März 2010, 14:00–18:00, Poster A

Micromagnetic properties of narrow PdFe and PdNi strips — •Daniel Steininger, Dominik Preusche, Maurice Ziola, Günther Bayreuther, and Christoph Strunk — Institut für Angewandte und Experimentelle Physik, Universität Regensburg

We present an investigation of submicron ferromagnetic strips from PdFe and PdNi intended to act as contact electrodes to carbon nanotube-based spin devices.

Various strips are studied for their magnetic properties with respect to coercive fields, ferromagnetic transition temperature and micromagnetic structure depending on their aspect ratio and material composition.

Magnetic hysteresis measurements on Pd_0.95Fe_0.05-, Pd_0.83Ni_0.17- and Pd_0.3Ni_0.7 using a magneto optical Kerr magnetometer were performed on arrays containing strip widths from 100nm to 2.5 µm. For further investigation of the spontaneous magnetization we measured the anisotropic magnetoresistance on individual Pd_0.3Ni_0.7 strips and performed wide angle x-ray scattering to examine the lattice texture of Pd_0.3Ni_0.7-Films. Atomic- and magnetic force microscopy confirm independently the micromagnetic structure of Pd_0.3Ni_0.7 electrodes.