Berlin 2015 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 49: POSTER II
MA 49.19: Poster
Donnerstag, 19. März 2015, 15:00–18:00, Poster A
Investigation of a Spin forbidden transition on the molecular nanomagnet Fe3CrPh using Torque detected broad band electron spin resonance (TDESR) in combination with Photon induced methods — •Eric Heintze1, Michael Slota1, Marian Blankenhorn1, Andrea Cornia2, Joris van Slageren3, Brad Moores4, Christian L. Degen4, Martin Dressel1, and Lapo Bogani1 — 11. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, 70569 Stuttgart, Germany — 2Dipartimento di Scienze Chimiche e Geologiche and UdR INSTM, Università di Modena e Reggio Emilia, via G. Campi 183, 41125 Modena, Italy — 3Institut für Physikalische Chemie, Universität Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany — 4Department of Physics, HPF F6, ETH Zürich, Otto Stern Weg 1, 8093 Zürich, Switzerland
We show TDESR to measure the high frequency electron spin resonance spectra of the molecular nanomagnet Fe3CrPh. We demonstrate the use of a mechanically-detected EPR setup with optical excitations and tunable frequency sources to induce magnetic resonance transitions which are detected using cantilever torque magnetometry. Furthermore we show how we combined TDESR with Photon excited Torque Magnetometry (PheToM) to excite and detect a spin forbidden transition in Fe3CrPh. The results are compared to simulations, W-Band-ESR and AC-SQUID data. We present an interferometric setup to increase the sensitivity of TDESR and we provide the key points for the improvement of the sensitivity down to sub-monolayer coverages, as required for molecular spintronic devices and investigations.