Measurement system of temperature and magnetic-field-dependent physical properties

• Subject Area: Statistical Physics, Nonlinear Dynamics, Complex Systems, Soft and Fluid Matter, Biological Physics
• Term: Funded in 2023
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 524190434

This proposal aims for a magnetocryotstat system that allows us to perform characterization measurements of solid-state samples over a wide temperature and magnetic-field range. In order to cover the broad range of different material classes, which are studied by the various collaborative research projects in our institute we need a modular system that first of all offers a variety of basic sample characterization via electrical resistivity, magnetization, and heat capacity measurements. These tools are often needed as a quality and performance control of new samples or devices, but besides that also reveal whether, e.g., an intended systematic variation of material's properties or of device properties appears feasible. In addition, the system shall be used as magneto-cryogenic platform for the implementation of broadband spectroscopic measurements. These methods are adapted to the PPMS via dedicated insets and sample-holders featuring coaxial lines suited for microwave application, high voltages, or even optical fibers. Such measurements are more specialized and rely on home-made hardware and software attached to the commercial system.

• DFG Programme: Major Research Instrumentation
• Major Instrumentation: Apparatur zur Messung von temperatur- und magnetfeldabhängigen physikalischen Eigenschaften
• Instrumentation Group: 0150 Geräte zur Messung der magnetischen Materialeigenschaften
• Applicant Institution: Universität zu Köln
• Leader: Professor Dr. Thomas Lorenz