Browsing Qatar University Science Journal - [From 1981 TO 2007] by Author "Abbas, Y."

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    • Neutron Diffraction And Mossbauer Effect Study On A Mixed Rare Earth Garnet 

      Fayek, M. K. [محمد خورشيد فائق]; Moberg, L.; Abbas, Y.; Bahgat, A. A. ( Qatar University , 1983 , Article)
      A powder sample of Y^YbFesO,; was prepared using the ceramic technique. X-ray diffraction pattern showed a single phase of the garnet type structure with a lattice constant 12.323 A". Specific heat for this composition was ...

    • ON THE CRYSTAL AND HYPERFINE PARAMETERS OF THE HEXAGONAL Ba Cax Sr1_xFe4 O8 MONOFERRITES 

      Fayek, M. K. [محمد خورشيد فائق]; Abbas, Y.; Elnimr, M.; Saleh, H. ( Qatar University , 1983 , Article)
      The alkaline earth monoferrites BaCaxSr1-xFe4O8 with X = 0,0.5and 1, were studied by Mossbauer spectroscopy and neutron diffractometry over a wide range of temperatures (78 - 900 K). The lattice constants were obtained ...