High-Pressure Phase Diagram of NdFeAsOF: Disappearance of superconductivity on the verge of ferromagnetism from nd moments
arXiv:1807.07729 · doi:10.1103/PhysRevB.98.094504
Abstract
We investigated transport and magnetic properties of NdFeAsOF single crystal under hydrostatic pressures up to 50\,GPa. The ambient pressure superconductivity at 45.4\,K is fully suppressed at 21 GPa. Upon further increase of the pressure, the ferromagnetism associated with the order of rare-earth subsystem is induced at the border of superconductivity. Our finding is supported by the hysteresis in the magnetization () loops and the strong increase in the field cooled data, (), toward low temperatures. We also show that the temperature evolution of the electrical resistivity as a function of pressure is consistent with a crossover from a Fermi-liquid to non-Fermi-liquid to Fermi-liquid. These results give access to the high-pressure side of the superconducting phase diagram in 1111 type of materials.
arXiv comment6 pages, 4 figures
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