The Synthesis and Characterization of LiFeAs and NaFeAs

2; (2) LBNL; 3); (3) HKUST; (4) Department of Chemistry; A. M. Guloy (4); Berkeley; B. Lorenz (1); B. Lv (4); CA

arxiv: 0902.0806 · v1 · pith:IJICYL4Cnew · submitted 2009-02-04 · ❄️ cond-mat.supr-con

The Synthesis and Characterization of LiFeAs and NaFeAs

C. W. Chu (1 , 2 , 3) , F. Chen (1) , M. Gooch (1) , A. M. Guloy (4) , B. Lorenz (1) , B. Lv (4)

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K. Sasmal (1) Z. J. Tang (4) J. H. Tapp (4) Y. Y. Xue (1) ((1) Department of Physics TCSUH University of Houston Houston TX (2) LBNL Berkeley CA (3) HKUST Hong Kong China (4) Department of Chemistry TX)

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keywords li111na111beenlifeasmagneticnafeassuperconductingalthough

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The newest homologous series of superconducting As-pnictides, LiFeAs (Li111) and NaFeAs (Na111) have been synthesized and investigated. Both crystallize with the layered tetragonal anti-PbFCl-type structure in P4/nmm space group. Polycrystalline samples and single-crystals of Li111 and Na111 display superconducting transitions at ~ 18 K and 12-25 K, respectively. No magnetic order has been found in either compound, although a weak magnetic background is clearly in evidence. The origin of the carriers and the stoichiometric compositions of Li111 and Na111 were explored.

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The Synthesis and Characterization of LiFeAs and NaFeAs

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