Berlin 2018 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 21: Poster I

MA 21.107: Poster

Dienstag, 13. März 2018, 09:30–13:00, Poster A

High TMR at Room Temperature in Magnetic Tunnel Junctions with Phenalenyl-molecule Tunnel Barriers — •Neha Jha¹, Christian Denker¹, Anand Paryar², Pavan K. Vardhanapu², Heba Mohamad¹, Ulrike Martens¹, Christiane Helm¹, Swadhin Mandal², and Markus Münzenberg¹ — ¹Institut für Physik, Universität Greifswald, Germany — ²Department of Chemical Sciences, IISER, Kolkata, India

Phenalenyl (PLY) based molecules, which can be regarded as Graphene fragments are promising candidates for spintronic applications. Attempts to use open shell PLY molecules have been unsuccessful due to their instability. We investigated a new closed shell molecule, PLY with a Copper complex, for its spintronics suitability. TMR in various samples of PLY-Cu MTJs was determined by measuring the resistance across the MTJ under a high magnetic field during parallel and anti-parallel configurations of the ferromagnets (FMs). Preliminary results show outstanding Magnetoresistance (MR) at room temperature. Our works demonstrate convincingly that spin-polarized currents can be injected into organic materials with reasonably high efficiency, providing strong evidence of spin polarized tunneling as the dominant transport mechanism in PLY-Cu based magnetic tunnel junctions, and the use of PLY-based molecules as a viable and scalable platform for building molecular-scale quantum spin memory and processors for technological development.