May 26 – 29, 2015
Hotel Rigi Kulm
Europe/Zurich timezone
7th Status Meeting 2015, Rigi Kulm

Tracking the photo-induced phase transition in breathing-crystals

May 28, 2015, 9:00 AM
Main Lecture Hall (Hotel Rigi Kulm)

Main Lecture Hall

Hotel Rigi Kulm

6410 Rigi Kulm Switzerland


Mr Sebastian Walfort (University of Rennes 1)


The concept of photo-induced phase transitions and of time-resolved experiments will be illustrated on the basis of photoswitchable copper-nitroxide molecular magnets. Molecular compounds with photoswitchable magnetic properties have been intensively investigated over the last decades due to their prospective applications in nanoelectronics, sensing and magnetic data storage. As a more recent material that allows optical manipulation of its magnetization, copper-nitroxide-based compounds have emerged as a new class of spin-crossover systems. Unlike in classical spin-crossover compounds, the change in magnetic properties is based on reversible magneto-structural rearrangements between weakly and strongly exchange-coupled states of spin triads nitroxide–copper(II)–nitroxide (WS/SS states). The mechanism of photoswitching between the two states and the resulting cooperative phenomenon is far from understood and requires ultrafast, time-resolved measurement techniques. Initial results covering a time range from femto- to microseconds using pump-probe absorption spectroscopy will be presented.

Primary author

Mr Sebastian Walfort (University of Rennes 1)

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