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Dresden 2014 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 46: Low-Dimensional Systems: Molecular Conductors

TT 46.5: Talk

Tuesday, April 1, 2014, 15:00–15:15, HSZ 204

Low temperature phase diagram of κ-(BETS)2FeCl4 — •Michael Kunz1, Werner Biberacher1, Karl Neumaier1, Natasha D. Kushch2, and Mark V. Kartsovnik11Walther-Meißner-Institut, Garching, Germany — 2Institute of Problems of Chemical Physics, Chernogolovka, Russia

The organic charge transfer salts of the (BETS)2FeX4 (X = Cl or Br) family are a subject of intensive research due to interesting correlation effects and magnetic ordering coexisting with superconductivity. κ-(BETS)2FeCl4 is an antiferromagnetic (AFM) metal with a Néel temperature TN≈ 0.45 K. Interlayer resistance measurements were used to track the behavior of the phase boundaries with a magnetic field applied in different directions. Thus the low temperature phase diagram of κ-(BETS)2FeCl4 under applied magnetic field, which shows some remarkable features, was obtained. Shubnikov-de Haas oscillations below the Néel temperature reveal a significant impact of antiferromagnetism on the Fermi surface.

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