Effect of pressure on the magnetostructural transition in SrFe2As2

M. Kumar; M. Nicklas; A. Jesche; N. Caroca-Canales; M. Schmitt; M. Hanfland; D. Kasinathan; U. Schwarz; H. Rosner; C. Geibel

doi:10.1103/PhysRevB.78.184516

Effect of pressure on the magnetostructural transition in SrFe2As2

Superconductivity 2008-12-15 v2 Strongly Correlated Electrons

Authors: M. Kumar , M. Nicklas , A. Jesche , N. Caroca-Canales , M. Schmitt , M. Hanfland , D. Kasinathan , U. Schwarz , H. Rosner , C. Geibel

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Abstract

We present a systematic pressure study of poly- and single crystalline SrFe2As2 by electrical resistivity and X-ray diffraction measurements. SrFe2As2 exhibits a structural phase transition from a tetragonal to an orthorhombic phase at T0=205 K. The structural phase transition is intimately linked to a spin-density-wave transition taking place at the same temperature. Our pressure experiments show that T0 shifts to lower temperatures with increasing pressure. We can estimate a critical pressure of 4 to 5 GPa for the suppression of T0 to zero temperature. At pressures above 2.5 GPa the resistivity decreases significantly below Tx=40 K hinting at the emergence of superconductivity but no zero-resistance state is observed up to 3 GPa.

Keywords

high-pressure phase transitions single crystal superconductivity magnetic structure

Cite

@article{arxiv.0807.4283,
  title  = {Effect of pressure on the magnetostructural transition in SrFe2As2},
  author = {M. Kumar and M. Nicklas and A. Jesche and N. Caroca-Canales and M. Schmitt and M. Hanfland and D. Kasinathan and U. Schwarz and H. Rosner and C. Geibel},
  journal= {arXiv preprint arXiv:0807.4283},
  year   = {2008}
}

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5 pages, 4 figures, accepted for publication in Phys. Rev. B

Effect of pressure on the magnetostructural transition in SrFe2As2

Abstract

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