Dresden 2014 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 80: Low-Dimensional Systems - Poster Session
TT 80.17: Poster
Mittwoch, 2. April 2014, 15:00–19:00, P2
Antiferromagnetism, superconductivity and quantum oscillations in the bifunctional organic conductor κ-(BETS)2FeBr4 — •Ludwig Scheidhammer1, Michael Kunz1, Werner Biberacher1, Natasha D. Kushch2, and Mark V. Kartsovnik1 — 1Walther-Meißner-Institut, Garching, Germany — 2Institute of Problems of Chemical Physics, Chernogolovka, Russia
The layered organic metal κ-(BETS)2FeBr4 is a bifunctional material that consists of organic layers containing a metallic π electron system and inorganic layers that carry localized magnetic moments. It shows an antiferromagnetic (AFM) transition with the Néel temperature TN≈ 2.5 K and a superconducting (SC) transition at the critical temperature Tc≈ 1.1 K. Shubnikov-de Haas oscillations have been studied in both the normal metallic and AFM states at different magnetic field orientations. From the angle dependence of the oscillation amplitude the exchange field can be obtained. The comparison of the oscillations in AFM and normal metallic state yields information on the Fermi surface reconstruction in the AFM state. We also present the angle dependence of the metamagnetic transition and discuss its influence on superconductivity.