Publications [#245798] of Albert M. Chang

Papers Published
  1. Mok, BH; Rao, SM; Ling, MC; Wang, KJ; Ke, CT; Wu, PM; Chen, CL; Hsu, FC; Huang, TW; Luo, JY; Yan, DC; Ye, KW; Wu, TB; Chang, AM; Wu, MK, Growth and investigation of crystals of the new superconductor α-FeSe from KCl solutions, Crystal Growth & Design, vol. 9 no. 7 (2009), pp. 3260-3264 [doi] .

    Crystals of FeSe 0.88 and FeSeMn 0.1 have been grown from KCl solutions. Crystals measuring 2-3 mm across and 0.1-0.3 mm thick grow with a hexagonal plate like habit. Powder X-ray diffraction (XRD) measurements show strong peaks corresponding to the tetragonal α-FeSe phase and weak hexagonal β-FeSe peaks in both cases. The plate side of the crystal is identified to be the (101) face of the tetragonal R-FeSe. Energy dispersive X-ray spectroscopic (EDS) measurements show that Mn substitutes for Fe. Both types of crystals show a superconducting transition at 8 Kin the DC magnetization measurements and a broad resistive transition with zero resistance at 7.5 K with an onset at 11 K. Specific heat measurements also confirm bulk superconductivity in the crystals. Crystals could also be grown using KBr as a solvent. © 2009 American Chemical Society.