title: Modeling of nanoparticular magnetoresistive systems and the impact on molecular recognition.
abstract: The formation of magnetic bead or nanoparticle superstructures due to magnetic dipole dipole interactions can be used as configurable matter in order to realize low-cost magnetoresistive sensors with very high GMR-effect amplitudes. Experimentally, this can be realized by immersing magnetic beads or nanoparticles in conductive liquid gels and rearranging them by applying suitable external magnetic fields. After gelatinization of the gel matrix the bead or nanoparticle positions are fixed and the resulting system can be used as a magnetoresistive sensor. In order to optimize such sensor structures we have developed a simulation tool chain that allows us not only to study the structuring process in the liquid state but also to rigorously calculate the magnetoresistive characteristic curves for arbitrary nanoparticle arrangements. As an application, we discuss the role of magnetoresistive sensors in finding answers to molecular recognition.
authors.affiliation: Bielefeld Institute for Applied Materials Research, Computational Materials Science and Engineering, University of Applied Sciences Bielefeld, Wilhelm-Bertelsmann-Str. 10, Bielefeld 33602, Germany. lisa.teich@fh-bielefeld.de.|Center for Spinelectronic Materials and Devices, Department of Physics, Bielefeld University, P.O. 100131, Bielefeld 33501, Germany. lisa.teich@fh-bielefeld.de.
authors.forename: Lisa
authors.initials: L
authors.lastname: Teich
authors.affiliation: Bielefeld Institute for Applied Materials Research, Computational Materials Science and Engineering, University of Applied Sciences Bielefeld, Wilhelm-Bertelsmann-Str. 10, Bielefeld 33602, Germany. dkappe@physik.uni-bielefeld.de.|Center for Spinelectronic Materials and Devices, Department of Physics, Bielefeld University, P.O. 100131, Bielefeld 33501, Germany. dkappe@physik.uni-bielefeld.de.
authors.forename: Daniel
authors.initials: D
authors.lastname: Kappe
authors.affiliation: Center for Spinelectronic Materials and Devices, Department of Physics, Bielefeld University, P.O. 100131, Bielefeld 33501, Germany. trempel@physik.uni-bielefeld.de.
authors.forename: Thomas
authors.initials: T
authors.lastname: Rempel
authors.affiliation: Center for Spinelectronic Materials and Devices, Department of Physics, Bielefeld University, P.O. 100131, Bielefeld 33501, Germany. judith.mey@gmx.de.
authors.forename: Judith
authors.initials: J
authors.lastname: Meyer
authors.affiliation: Bielefeld Institute for Applied Materials Research, Computational Materials Science and Engineering, University of Applied Sciences Bielefeld, Wilhelm-Bertelsmann-Str. 10, Bielefeld 33602, Germany. christian.schroeder@fh-bielefeld.de.
authors.forename: Christian
authors.initials: C
authors.lastname: Schröder
authors.affiliation: Center for Spinelectronic Materials and Devices, Department of Physics, Bielefeld University, P.O. 100131, Bielefeld 33501, Germany. andreas.huetten@uni-bielefeld.de.
authors.forename: Andreas
authors.initials: A
authors.lastname: Hütten