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MA: Fachverband Magnetismus

MA 35: Poster 2

MA 35.53: Poster

Donnerstag, 8. September 2022, 16:00–18:00, P4

In-situ rotation of sample in the magnet with a rotator — •M. Safiri, P. Y. Portnichenko, M. Siegel, and D. S. Inosov — TU Dresden, Germany

Field-induced collective excitations in f-electron systems with multipolar order parameters were recently shown to exhibit significant anisotropy in field space even in structurally cubic systems, such as CeB6 [P. Y. Portnichenko et al., Phys. Rev. X 10, 021010 (2020)]. However, following such changes in the excitation spectrum in a neutron scattering experiment currently requires a tedious and time-consuming sample realignment for every field direction. To enable a much faster in-situ rotation of the sample inside a cryomagnet, we have designed and manufactured a compact piezo-driven rotator with a diameter of 32 mm that is compatible with cryomagnets used on the time-of-flight or triple-axis neutron spectrometers, up the maximum field of 10 T. This new piece of sample environment will allow us to change the sample orientation within 360^∘ by rotating it precisely around the momentum transfer Q at low temperatures, which corresponds to a rotation of magnetic field in the vertical plane orthogonal to Q. This is supposed to add a new dimension to neutron-spectroscopy measurements, facilitating continuous scans vs. magnetic field angle that contain crucial information about magnetic anisotropy and other spin-orbit coupling effects.