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    STUDIA PHYSICA - Issue no. 2 / 2008  
         
  Article:   X-RAY PHOTOELECTRON SPECTROSCOPY OF MNSB1-XBIX.

Authors:  L. REDNIC, M. COLDEA, V. REDNIC, M. NEUMANN, D. BENEA. 		 
       
         
  Abstract:  X-ray Diffraction (XRD) and X-ray Photoelectron Spectroscopy (XPS) of MnSb1-xBix (x= 0, 0.2, 0.5 and 0.95) system are reported. Both MnBi and MnSb crystallize into two different phases: a hexagonal ferromagnetic nickel-arsenide (NiAs) structure type and an orthorhombic paramagnetic zinc-blende (ZB) phase. The zinc-blende structure of MnSb and MnBi is mechanically unstable and would transform spontaneously into a metastable denser tetragonal phase. The substitution of Sb by Bi in MnSb generates new compound which preserve the same hexagonal nickel-arsenide (NiAs) crystallographic structure type. The formation of MnSb1-xBix phase is confirmed by X-ray diffraction measurements, valence band and core level XPS spectra.

Keywords: XPS spectra, nickel-arsenide structure type, X-ray diffraction. 		 
         
     
         
         
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