Structural transition and anisotropic properties of single crystalline SrFe2As2

Details Structural transition and anisotropic properties of single crystalline SrFe2As2 Structural transition and anisotropic properties of single crystalline SrFe2As2

2008-06-17

arxiv.org/abs/0806.2711v1

Phys. Rev. B. 78, 024516 (2008)

Physics

Condensed Matter

Superconductivity

Scientific paper

10.1103/PhysRevB.78.024516

Plate-like single crystals of SrFe2As2 as large as 3x3x0.5 mm3 have been grown out of Sn flux. The SrFe2As2 single crystals show a structural phase transition from a high temperature tetragonal phase to a low temperature orthorhombic phase at To = 198 K, and do not show any sign of superconductivity down to 1.8 K. The structural transition is accompanied by an anomaly in the electrical resistivity, Hall resistivity, specific heat, and the anisotropic magnetic susceptibility. In an intermediate temperature range from 198 K to 160 K, single crystal X-ray diffraction suggests a coexistence of the high-temperature tetragonal and the low-temperature orthorhombic phases.

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