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MA: Fachverband Magnetismus
MA 19: Characterization and Instrumentation
MA 19.1: Vortrag
Montag, 16. März 2020, 17:15–17:30, HSZ 101
Measuring Antiferromagnets with a SQUID Setup in Magnetically Shielded Environments — •Michael Paulsen1, Jörn Beyer1, Michael Fechner2, Klaus Kiefer3, Bastian Klemke3, Julian Lindner3, 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 possess zero net dipole magnetization. While predictions of higher order magnetizations have been made for Cr2O3, few confirmed measurements exist. In this contribution, we present low-temperature measurements gained on different systems with antiferromagnetic order in very low magnetic backgrounds using a dedicated SQUID setup. In particular, we discuss our results on exterior quadrupolar magnetic fields and relate the distinct quadrupolar magnetic signals to the microscopic spin arrangement in our model systems.