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Here we report the fabrication and superconductivity of the iron-based arsenic oxide SmO1-xFxFeAs compound.X-ray diffraction(XRD) results prove that the lattice parameters a and c decrease systematically with increasing x in between 00.35 the a and c increase with the decrease of x in the SmO1-xFxFeAs.The critical temperature(Tc) increases with increasing x in between 0.15≤x≤0.3,while x>0.3 the Tc decreases with the increase of x.It is found that at x=0.3 SmO0.7F0.3FeAs has the highest onset resistivity transition temperature of 55.5 K.The critical current density(Jc) value at 10 K for the obtained SmO0.7F0.3FeAs is 1.3×10 5 A/cm2(0T).Meanwhile one can estimates Hc2(0) from the slope of the Hc2(T) curve at T =Tc(HC2 is the upper critical field),and for the 90% normal-state resistivity(ρn) criterion(Tc=55 K),Hc2(0) is determined to be ～253 T.
Here we report the fabrication and superconductivity of the iron-based arsenic oxide SmO1-xFxFeAs compound. X-ray diffraction (XRD) results prove that the lattice parameters a and c decrease systematically with increasing x in between 0 0.35 the a and c increase with the decrease of x in the SmO1-xFxFeAs. critical temperature (Tc) increases with increasing x in between 0.15≤x≤0.3 while while x> 0.3 the Tc decreases with the increase of x. It is found that at x = 0.3 SmO 0.7 F 0.3 FeAs has the highest onset resistivity transition temperature of 55.5 K. The critical current density (Jc) value at 10 K for the obtained SmO 0.7 F 0.3 FeAs is 1.3 × 10 5 A / (0) from the slope of the Hc2 (T) curve at T = Tc (HC2 is the upper critical field), and for the 90% normal-state resistivity (pn) criterion Tc = 55 K), Hc2 (0) is determined to be ~ 253 T.