Pressure-induced successive structural transitions and high-pressure tetragonal phase of Fe1.08Te

Article

关键词: X-RAY-DIFFRACTION;    SUPERCONDUCTIVITY;   

DOI  :  10.1103/PhysRevB.86.094505

来源: SCIE

【 摘 要 】

We report the effects of hydrostatic pressure on the temperature-induced phase transitions in Fe1.08Te in the pressure range 0-3 GPa using synchrotron powder x-ray diffraction. The results reveal a plethora of phase transitions. At ambient pressure, Fe1.08Te undergoes simultaneous first-order structural symmetry-breaking and magnetic phase transitions, namely, from the paramagnetic tetragonal (P4/nmm) to the antiferromagnetic monoclinic (P2(1)/m) phase. We show that, at a pressure of 1.33 GPa, the low-temperature structure adopts an orthorhombic symmetry. More importantly, for pressures of 2.29 GPa and higher, a symmetry-conserving tetragonal-tetragonal phase transition has been identified from a change in the c/a ratio of the lattice parameters. The succession of different pressure and temperature-induced structural and magnetic phases indicates the presence of strong magnetoelastic coupling effects in this material.

【 授权许可】

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