Dresden 2006 – scientific programme

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MA: Magnetismus

MA 20: Poster: Films(1-36) Transp(37-56) Ex.Bias(57-67) Spindyn(68-80) Micromag(81-95) Particle(96-109) Imag.+Surface(110-113) Spinelectr(114-122) Theory+Micromag(123-131) Spinstr+Aniso(132-142) MagMat(143-156) Meas(157,158) MolMag+Kondo(159-162) Postdead(163-)

MA 20.96: Poster

Tuesday, March 28, 2006, 15:15–19:15, P1

Development of new magnetic layer systems for the manipulation and detection of magnetic particles — •Michael Schilling, Astrit Shoshi, Andreas Hütten, and Günter Reiss — Department of physics, Bielefeld University, Postfach 100131, D-33501 Bielefeld

Modern experiments with magnetic nanoparticles need customized magnetic layer systems for the detection and manipulation of single particles. New GMR and TMR stacks are developed to enhance sensitivity and reproducability of the magnetic sensors. The layer stacks are then patterned using e-beam and laser lithography. First experiments with the resulting XMR-sensors show promising results for future single marker detection.

In order to create higher forces for an on-chip manipulation of magnetic beads, magnetic layer systems are sputtered below conducting lines. The magnetic layer system, that is aligned by a current through the conducting line, allows a better magnetization of the magnetic particles and therefore to apply higher forces.