Search for long-range order in murunskite (K2Cu3FeS4)
Over the past three decades, most extensively studied ionic metals were the high-temperature superconductors: oxides and pnictides, where the coordinating anions are oxygen and arsenic/phosphorus, respectively. Murunskite (K2FeCu3S4) interpolates between the best known High-Tc superconductors with the same tetragonal ThCr2Si2-type structure as 122 pnictides and sharing chalcogen anions as cuprates. Resistivity measurements on as-synthesized single crystal murunskite show insulating behavior, same as undoped cuprates and pnictides, while measurements of magnetization and specific heat indicate a transition into a long range ordered state below ~90K. We propose a neutron diffraction experiment to elucidate the magnetic structure within the ordered state.
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Davor Tolj; FAVRE Virgile; RITTER Clemens; Henrik M. Ronnow and ZIVKOVIC Ivica. (2021). Search for long-range order in murunskite (K2Cu3FeS4). Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-31-2772
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