SKM 2021 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 18: Posters Magnetism V

MA 18.14: Poster

Freitag, 1. Oktober 2021, 10:00–13:00, P

Single-crystal growth and magnetic characterization of rare-earth-doped yttrium orthosilicate — •Tim Hofmann, Andreas Bauer, Fabian Keßler, and Christian Pfleiderer — Chair for the Topology of Correlated Systems, Department of Physics, Technical University of Munich, Germany

The monoclinic Yttrium orthosilicate Y2SiO5 doped with several ten ppm of rare-earth atoms, such as Er3+, Yb3+, or Nd3+, is a candidate material for optical applications in quantum information technology. The amount of dopants decisively influences key properties, such as the linewidth or the coherence time, and in turn precise control on the doping levels is essential. Here, we report the preparation of poly-crystalline material using a sol–gel process, followed by single-crystal growth by means of the optical floating zone technique. The quantitative determination of doping on ppm level is challenging when using conventional characterization techniques. Instead, we infer information from magnetization measurements at low temperature for magnetic fields up to 14 T applied along the optical axes b, D1, and D2. We find paramagnetic contributions characteristic of rare-earth ions. Distinct anisotropy hints towards the importance of crystal electric field effects for both the fundamental characterization and potential applications in quantum information technology.

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