Regensburg 2019 – scientific programme

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MA: Fachverband Magnetismus

MA 30: Magnetic instrumentation and characterization

MA 30.2: Talk

Wednesday, April 3, 2019, 11:00–11:15, H53

SQUID Setup for the Measurement of Antiferromagnets and other Magnetically Weak Samples — Michael Paulsen¹, Jörn Beyer¹, Michael Fechner², Klaus Kiefer³, •Bastian Klemke³, and Dennis Meier⁴ — ¹Physikalisch-Technische Bundesanstalt, Berlin, Germany — ²Max Planck Institute for the Structure and Dynamics of Matter, CFEL, Hamburg, Germany — ³Helmholtz-Zentrum Berlin, Berlin, Germany — ⁴Norwegian University of Science and Technology, Trondheim, Norway

Antiferromagnets have been studied for several decades in fundamental research and, more recently, as materials of interest in spintronic devices. While these materials typically possess zero net magnetization, predictions of a permanent magnetization of higher order have been made but very few confirmed measurements exist. In this presentation, the development of a SQUID setup for the measurement of antiferromagnets and other weakly magnetic samples is presented. The initial measurements demonstrate that the setup is especially well suited for measuring weak quadrupolar magnetic fields in magnetically shielded rooms.