Dresden 2017 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 54: Poster Session: Cryotechnique
TT 54.1: Poster
Mittwoch, 22. März 2017, 15:00–19:00, P2-OG3
Torque-detected electron spin resonance and torque magnetometry — •Alexey Alfonsov1, Julian Zeisner1, Vladislav Kataev1, and Bernd Büchner1,2 — 1Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden, IFW Dresden, D-01171 Dresden, Germany — 2Technische Universität Dresden, D-01062 Dresden, Germany
Magnetic anisotropy is a key property of many materials, which has been under a great interest of scientists from around the world. The magnetic anisotropy is defined by the complex interplay of different degrees of freedom, such as spin or/and orbital moments, charge and lattice. One of the most appropriate methods to study magnetic anisotropies, and related properties is high field and multifrequency electron spin resonance (HF-ESR). Unfortunately samples of many new materials interesting for the investigation are available in very small sizes: in some cases it is complicated to synthesize large crystals, in other cases, the size is a key property of the material itself. This all rises a problem of the detection of the ESR signal from such a small sample, especially in the case of a multifrequency ESR spectrometer, where in order to increase the sensitivity one has to apply restrictions on the microwave frequency, strength and orientation of magnetic field. To overcome this problem we develope a multifrequency cantilever-based (torque-detected) ESR spectrometer, which, additionally, in the absence of the microwave radiation is transformed into a torque magnetometer.