Abstract
Magneto-optical Kerr rotation of thin films of TbPc2 single molecule magnets can be tuned at room temperature within almost two orders of magnitude by the choice of the substrate.
Highlights
The red dotted lines represent the imaginary part of the complex Kerr rotation angle, which is related to the ellipticity of the light polarization state after reflection on the magnetized sample
In this work we fabricated thin films of the single molecule magnet (SMM) TbPc2 by thermal evaporation in vacuum on several substrates, which can be regarded as model systems for organic electronic and spintronic applications
By combining spectroscopic ellipsometry and magneto-optical Kerr effect (MOKE) results, we determined for the first time the optical and magnetooptical constants of thin films of TbPc2
Summary
We investigated the MOKE response of thin films of TbPc2 on substrates, which are relevant for (spin)OFETs (SiO2) or vertical spin valves (Co) in order to explore the possibility of implementing TbPc2 in magneto-electronic devices, the functionality of which includes optical reading. The combination of spectroscopic ellipsometry and MOKE investigations was employed to extract the intrinsic magneto-optical response, i.e. the complete set of optical and magneto-optical constants and, the complete dielectric tensor for TbPc2 layers. We investigated the role of the substrate on the magneto-optical activity of TbPc2 by inserting a templating molecular layer between the SiO2 substrate and TbPc2. The diamagnetic background of the silicon substrate was determined from the slope in the saturation regime and subtracted
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