Structural transition and anisotropic properties of single-crystallineSrFe2As2

2008/06/17 by J. -Q. Yan, Jiaqiang Yan, A. Kreyßig +12 · 9 citations
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paper · pdf · doi:10.1103/physrevb.78.024516

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

arxiv created 2008/06/17 · openalex publication_date 2008/07/23 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

Platelike single crystals of SrFe₂As₂ as large as 3\ifmmode×\else\texttimes\fi3\ifmmode×\else\texttimes\fi0.5 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 T_o=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 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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