Improvement of Three-Fluid Model on Microwave Characteristics for High-Tc Superconductors.

• Imai Tadashi

  Faculty of Engineering,Saitama University

• Sakakibara Takaaki

  Faculty of Engineering,Saitama University

• Kobayashi Yoshio

  Faculty of Engineering,Saitama University

Bibliographic Information

Other Title

• 高温超伝導体のマイクロ波特性のための3流体モデルの改善

Abstract

In order to explain the microwave characteristics of high-T_c superconductors in room to cryogenic temperature,an improved three- fluid model is proposed in which the temperature dependence of the momentum relaxation time τ is introduced.The temperature dependenc e of the surface impedance Z_s=R_s+jX_s,where R_s is the surface resistance and X_s is the surface reactance,and the complex conductivity σ=σ_1-j σ_2 of a YBCO bulk calculated from this mod el,agrees very well with measured ones.Also,this model enables us to explain a peak of σ_1 observed just below the critical temperat ure T_c which has a similar behavior one derived from the BCS theory.Finally,it is verified that the availability of ratio n_ res>, n_t to evaluate material quality of high-T_c superconductors,where n_res> is the residual normal electron density and n_t is the total electron density.

Journal

• IEICE technical report. Antennas and propagation

  IEICE technical report. Antennas and propagation 93 61-66, 1993

  The Institute of Electronics, Information and Communication Engineers

Keywords

• high-Tc superconductor
• microwave
• improved three-fluid model
• relaxation time
• electron density
• complex coductivity

Details

• CRID: 1571980077357893632
• NII Article ID: 110003248034
• NII Book ID: AN10060764
• Text Lang: ja
• Data Source:
  • CiNii Articles