Author/Authors :
Saint-Paul، نويسنده , , M. and Guttin، نويسنده , , C. and Abbassi، نويسنده , , A. and Wang، نويسنده , , Zhao-Sheng and Luo، نويسنده , , Huiqian and Lu، نويسنده , , Xingye and Ren، نويسنده , , Cong and Wen، نويسنده , , Hai-Hu and Hasselbach، نويسنده , , K.، نويسنده ,
Abstract :
Measurements of the real R and imaginary X parts of the surface impedance were performed in underdoped BaFe1.93Ni0.07 As2 crystals in the frequency range 10 MHz–1.5 GHz. The establishment of the antiferromagnetic order at TN~50 K gives rise to anomalous increase of electron scattering time. Drude type conductivity yields X and R differ from each other. The increase of the real conductivity σ1 in the superconducting state is attributed to a rapid decrease of the quasiparticle scattering time. This result gives evidence of coexistence of superconductivity and antiferromagnetism.
