Berlin 2015 – scientific programme
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MA: Fachverband Magnetismus
MA 49: POSTER II
MA 49.20: Poster
Thursday, March 19, 2015, 15:00–18:00, Poster A
Investigation of light-induced magnetic changes in nanomagnets using static and dynamic SQUID magnetometry — •Michael Slota1, Eric Heintze1, Andrea Cornia2, 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
The behavior of nanomagnets in molecular spintronic materials can be changed by using external stimuli such as photons. Although the use of photons offers a clean way to control spin states, undesired effects as heating processes makes the investigation of light-induced properties challenging. We demonstrate the use of static and dynamic susceptibility measurements under continuous light irradiation via a SQUID magnetometer to quantify heating effects and extract magnetic changes, where the used light-coupling setup enables a distinct control of the irradiation strength on a sample. The molecular nanomagnet Fe3CrPh serves as an example, of which a short lived light-induced spin forbidden transition from S=6 to S=7 has already been detected in Torque-detected ESR combined with Photon-excited Torque Magnetometry (PheToM) as a change of the magnetic response. In near future this technique is used to detect spin changes novel classes of molecular spintronic systems, where light-induced currents manipulates spintronic properties rather than light directly.