Regensburg 2013 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 40: Poster Session Correlated Electrons
TT 40.60: Poster
Mittwoch, 13. März 2013, 15:00–19:00, Poster D
Transverse susceptibility of high-quality single crystal MnSi — •Felix Rucker1, Andreas Bauer1, Alfonso Chacón1, Maximilian Hirschberger2,1, and Christian Pfleiderer1 — 1Technische Universität München, Physik-Department E21, D-85748 Garching, Germany — 2Department of Physics, Princeton University, Jadwin Hall, Princeton, USA
We have developed a bespoke ac susceptometer which is mounted to a computer controlled rotator. Our susceptometer permits low temperature measurements in applied magnetic fields as a function of angle ranging from a purely longitudinal to a purely transverse set up, i.e., the excitation field may be varied from a parallel to a perpendicular orientation with respect to the applied field, respectively. To demonstrate the operation of our susceptometer we have measured the ac susceptibility of high-quality single crystal MnSi, which reveals several unexpected features of the transverse susceptibility across the magnetic phase diagram. We discuss our results in the context of the comprehensive theoretical framework developed for the helical order and field-induced phases in B20 compounds.