Regensburg 2019 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 36: Spin transport

MA 36.9: Vortrag

Mittwoch, 3. April 2019, 17:15–17:30, H53

Organic spin valves based on spin-coated P(VDF-TrFE) films on La0.7Sr0.3MnO3 — •Camillo Ballani1 and Georg Schmidt1,21Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, Von-Danckelmann-Platz 3, 06120 Halle(Saale) — 2Interdisziplinäres Zentrum für Materialwissenschaften, Martin-Luther-Universität Halle-Wittenberg, Nanotechnikum Weinberg, 06120 Halle(Saale)

Organic spin valves (OSV) are well known for the occurrence of magnetoresistive effects and resistive switching and, therefore, have a huge potential for applications. However, the exact mechanism of transport through the organic interlayer often remains unclear [1]. Furthermore it has been demonstrated that the ferroelectric copolymer P(VDF-TrFE) in combination with a ferromagnetic La0.7Sr0.3MnO3 (LSMO) bottom layer exhibits large resistive switching (RS) effects [2]. The functionality of OSV devices for studying TAMR and RS requires smooth and continuous ultra-thin organic interlayers with clean interfaces. An easy way to deposit such films is spin-coating of dissolved organic polymer powder and subsequent thermal annealing. This study reports on properties like morphology and thickness dependence of spin-coated P(VDF-TrFE) copolymer thin films on the deposition parameters. The films are deposited on epitaxial ferromagnetic LSMO layers grown by pulsed laser deposition on SrTiO3 (001) substrates. Furthermore, we present a patterning process for OSV based on P(VDF-TrFE) and LSMO, and a characterization of their magnetotransport properties.
M. Grünewald et al., Phys.Rev. B, 84, 125208 (2011)
S. Majumdar et al., Adv.Funct.Mater. 28, 1703273 (2018)

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