Dresden 2017 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 19: Poster Session: Correlated Electrons 1

TT 19.56: Poster

Montag, 20. März 2017, 15:00–19:00, P2-EG

Cantilever-based torque magnetometry for de Haas-van Alphen experiments on correlated metals — •Marc Andreas Wilde, Schorsch Michael Sauther, Arthur Niedermayr, Andreas Bauer, and Christian Pfleiderer — Physik Department, Technische Universität München, James-Franck-Strasse 1, 85748 Garching, Germany

Cantilever-based torque magnetometers have been optimized to measure the quantum oscillations of the magnetization, i.e., the de Haas-van Alphen (dHvA) effect in both correlated bulk metals and low-dimensional electron systems. For strongly correlated bulk metals the focus of the sensor and readout design is on a compact, rotatable and Millikelvin-compatible setup that fits into the bore of standard high-field superconducting solenoids. For low-dimensional systems highest sensitivity due to the inherently small signal strength is a prerequisite. We present specific implementations based on capacitive readout and fiber-optical interferometry and discuss their advantages and limitations in the context of dHvA experiments on correlated metals. In particular when large bulk crystals are not available, position readout techniques that do not scale with the sensor size are shown to be advantageous.