Regensburg 2010 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 2: SC: Applications and Measuring Devices
TT 2.7: Vortrag
Montag, 22. März 2010, 12:00–12:15, H19
Development of a micro-Hall magnetometer for the study of light-induced effects in magnetic molecules — •Robert Lusche, Jan Dreiser, and Oliver Waldmann — Physikalisches Institut, Universität Freiburg, D-79104 Freiburg, Germany
Controlling magnetic properties in magnetic molecules with light is an intriguing effect and has recently attracted renewed interest [1]. In order to measure the magnetization in the presence of light we rely on micro-Hall-senors in our setup. Micro-Hall probes have been proven to be a simple and robust tool for magnetic measurements over a large range of experimental conditions. Here we present the design of our home-built micro-Hall magnetometer including an irradiation unit. It can be operated at temperatures down to 1.4 K and with magnetic fields of up to 5.5 T, and provides a resolution better than 10−7 emu. We demonstrate and characterize the performance by measurements on known spin-crossover complexes, and present first measurements on novel photomagnetic complexes.
[1] A. Bleuzen et al., Inorg. Chem. 48, 3453 (2009).