Warning: We observe an increase of emails from fake travel portals like . "travelhosting.co.uk". We never send links to such portals so be vigilant!

Dec 8 – 9, 2022
Marriott
Europe/Berlin timezone

Neutron depolarization measurements on HgCr2Se4 under pressure

Dec 8, 2022, 2:05 PM
25m
Marriott

Marriott

Talk (20 min + 5 min discussion) Quantum Phenomena Quantum Phenomena

Speaker

Pau Jorba

Description

The pressure dependent magnetic phase diagram of chromium spinel HgCr$_2$Se$_4$ was investigated up to 6 GPa. Hydrostatic pressure was applied with purposely built diamond anvil cells. The magnetic state of the samples was probed by neutron depolarization, where a pair of focusing neutron supermirror guides was used, increasing the signal intensity by a factor 20. The use of the neutron guides allowed forn an increase of an order of magnitude in the signal to noise ratio while maintaining the exposure time, compensating for the very small sample size insdie the diamond anvil cell. Given the strong competition between FM and AFM exchange in HgCr$_2$Se$_4$ and parent compounds, the different ground states and physical phenomenon observed are likely a consequence of complex coupling of structural distortions with the magnetic degrees of freedom.

Primary author

Co-authors

Alois Loidl (Center for Electronic Correlations and Magnetism, University of Augsburg) Christian Pfleiderer Marc Seifert Michael Schulz Peter Böni (Technische Universität München) Philipp Schmakat Dr Vladimir Tsurkan (Experimentalphysik V, Institut für Physik, Universität Augsburg)

Presentation materials

There are no materials yet.