Search for a magnetic quantum critical point in LuFe2Ge2 substitution series

ORAL

Abstract

As part of an extensive study of the RFe2Ge2 series [1] a SDW-like transition was discovered in LuFe2Ge2 near 9 K. Given that LuFe2Ge2 has the same structure as the AFe2As2 (A =Alkali and Alkali-Earth) Fe-based superconductors, the possibility of LuFe2Ge2 manifesting fragile magentism [2], and even exotic, emergent states that could be revealed as T-SDW is suppressed toward zero, was enticing. To address this, a study of Y, Sc, Co and Ru substitutions into LuFe2Ge2 was made [3]. Although phase diagrams constructed down to 2-3 K failed to reveal emergent effects [3], in this talk we will present magnetization and specific heat data down to 400 mK and 100 mK respectively. Updated phase diagrams will be presented and discussed.

[1] M.A. Avila et al., JMMM 270 (2004) 51.
[2] P.C. Canfield and S.L. Bud'ko, Annual Rev. of CMP 1 (2010) 27.
[3] S. Ran et al., Phil. Mag. 91 (2011) 4388.

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Presenters

  • Raquel Ribeiro

    Universidade Federal do ABC (Brazil), Iowa State University (USA), Universidade Federal do ABC, Ames Laboratory & Iowa State University

Authors

  • Raquel Ribeiro

    Universidade Federal do ABC (Brazil), Iowa State University (USA), Universidade Federal do ABC, Ames Laboratory & Iowa State University

  • Sergey Budko

    Iowa State University, Department of Physics, Iowa State University, Ames Laboratory, Ames, Iowa 50011, USA, Ames Laboratory, Iowa State University, Ames Laboratory/Iowa State University, Ames Laboratory and Dept. of Phys. and Astro.,, Iowa State Univ., Ames Laboratory and Department of Physics & Astronomy, Iowa State University, Ames, IA 50010, USA, Ames Lab & Dept of Physics and Astronomy, Iowa State University, Physics, Iowa State University/Ames Laboratory, Iowa State University and Ames Laboratory

  • Paul Canfield

    Ames Laboratory and Dept. of Physics, Iowa State University, Ames Laboratory, U.S. DOE, Iowa State University, Ames, Iowa 50011, USA., Ames Laboratory, Iowa State University, Department of Physics, Iowa State University, Ames Laboratory, Ames, Iowa 50011, USA, Ames Laboratory, Iowa State University, Ames Laboratory/Iowa State University, Iowa State University and Ames Laboratory, Ames Laboratory and Iowa State University, Ames, IA, USA, Ames Laboratory and Dept. of Phys. and Astro.,, Iowa State Univ., Ames Laboratory and Department of Physics & Astronomy, Iowa State University, Ames, IA 50010, USA, Ames Lab & Dept of Physics and Astronomy, Iowa State University, Department of Physics & Astronomy, Iowa State University, Department of physics and astronomy, Iowa State University/Ames Laboratory, Physics, Iowa State University/Ames Laboratory, Ames Laboratory & Iowa State University, Physics, Iowa State University