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- W4288058033 abstract "Eu(Fe0.75Ru0.25)2As2is an intriguing system with unusual coexistence of superconductivity and ferromagnetism, providing a unique platform to study the nature of such coexistence. To establish a magnetic phase diagram, time-domain synchrotron Mössbauer experiments in151Eu have been performed on a single crystalline Eu(Fe0.75Ru0.25)2As2sample under hydrostatic pressures and at low temperatures. Upon compression the magnetic ordering temperature increases sharply from 20 K at ambient pressure, reaching ∼49 K at 10.1 GPa. With further compression, the magnetic order is suppressed and eventually collapses. Isomer shift values from Mössbauer measurements and x-ray absorption spectroscopy data at EuL3edge show that pressure drives Eu ions to a homogeneous intermediate valence state with mean valence of ∼2.4 at 27.4 GPa, possibly responsible for the suppression of magnetism. Synchrotron powder x-ray diffraction experiment reveals a tetragonal to collapsed-tetragonal structural transition around 5 GPa, a lower transition pressure than in the parent compound. These results provide guidance to further work investigating the interplay of superconductivity and magnetism." @default.
- W4288058033 created "2022-07-28" @default.
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- W4288058033 date "2022-08-04" @default.
- W4288058033 modified "2023-10-18" @default.
- W4288058033 title "Pressure effect on magnetism and valence in ferromagnetic superconductor Eu(Fe<sub>0.75</sub>Ru<sub>0.25</sub>)<sub>2</sub>As<sub>2</sub>" @default.
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- W4288058033 doi "https://doi.org/10.1088/1361-648x/ac84bb" @default.
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