Surface impedance of BaFe_{2鈭?span style='font-style: italic'>x}Ni_xAs₂ crystals

详细信息    查看全文

• 作者：M. Saint-Paul^a ; ^{michel.saint-paul@neel.cnrs.fr" class="auth_mail} ; C. Guttin^a ; A. Abbassi^b ; Zhao-Sheng Wang^a ; ^c ; ¹ ; Huiqian Luo^c ; Xingye Lu^c ; Cong Ren^c ; Hai-Hu Wen^c ; ^d ; K. Hasselbach^a
• 关键词：A. Pnictides ; D. Superconductivity ; E. Surface impedance
• 刊名：Solid State Communications
• 出版年：May, 2014
• 年：2014
• 卷：185
• 期：Complete
• 页码：10-13
• 全文大小：992 K

文摘

Measurements of the real 蟽₁ and imaginary 蟽₂ part of the conductivity were performed in optimally doped BaFe_1.9Ni_0.1As₂ and overdoped BaFe_1.88Ni_0.12As₂ crystals in the frequency range 20 MHz-1.5 GHz using a single coil technique. The temperature dependence of the London penetration depth follows a T² law. The conductivity 蟽₁ increases with decreasing temperature below T_c in agreement with the results obtained for the optimally Co doped BaFe_2鈭?em>xCo_xAs₂ crystals. The increase of 蟽₁ in the superconducting state is attributed to a rapidly decrease of the quasiparticle scattering rate.