Microwave Properties of BaFe1.9Ni0.1As2 Superconducting Single Crystal
Microwave Properties of BaFe1.9Ni0.1As2 Superconducting Single Crystal
复制标题
BaFe1.9Ni0.1As2超导单晶的微波性能
DOI：
10.1007/s10948-012-2004-4
复制
发表时间：
2012
影响因子：
1.8
通讯作者：
A. Barannik
中科院分区：
文献类型：
--
作者：
Y. Wu;S. Luo;X. Jiang;F. Zhou;L. Cao;Y. He;N. Cherpak;V. Skresanov;A. Barannik
用自熔盐法成功地生长出高质量的BaFe_2-−_xNi_xAs_2超导单晶。研制了X波段和Ka波段两种微波测量装置。第一个是蓝宝石介质腔。样品由一个蓝宝石棒支撑在这个腔体的中心。另一种是利用准光介质谐振器(QDR)小室设计的。待测超导样品安装在池内。这两个系统分别密封在相似但不同的真空室中，并浸泡在液体4He中。研究了BaFe1.9Ni0.1As2的频变微波特性。用网络分析仪(Agilent N5230C)测量了传输响应和Q因子的温度依赖性。结果表明，在低温下，表面电抗的归一化变化和面内穿透深度的归一化变化与温度呈幂函数关系，证明了多能隙结构的存在。
High quality BaFe2−xNixAs2superconducting single crystals have been successfully grown by the self-flux method. Two types of equipment were developed for microwave measurements at X-band and Ka-band, respectively. The first one is a sapphire dielectric cavity. The sample is supported by a sapphire rod in the center of this cavity. The other one is designed by using Quasi-optic Dielectric Resonators (QDR) cells. The superconducting sample to be measured is mounted inside the cell. These two systems are sealed in similar but different vacuum chambers, respectively, and soaked in the liquid4He. The temperature of samples can be controlled from 1.6 to 30 K. Frequency dependent microwave properties of BaFe1.9Ni0.1As2were studied systematically. Temperature dependence of transmission response and Q-factor were measured by a network analyzer (Agilent N5230C). The results showed an evidence of multigap structure as the normalized changes in the surface reactance and the corresponding normalized changes in the in-plane penetration depth have power dependence of temperature at low temperature.
影响因子：
8.6
作者：
Hashimoto, K.;Shibauchi, T.;Matsuda, Y.
通讯作者：
Matsuda, Y.