AC losses and transverse resistivity in filamentary MgB2 tape with Ti barriers

作者：Polak M^*; Demencik E; Husek I; Kopera L; Kovac P; Mozola P; Takacs S

来源：Physica C-Superconductivity and Its Applications, 2011, 471(13-14): 389-394.

DOI：10.1016/j.physc.2011.04.004

• MgB2 superconductors
• AC losses
• Transverse resistivity

We measured and analyzed AC losses of MgB2 tape with 19 filaments surrounded by Ti barriers and embedded in copper stabilization, exposed to external magnetic field with frequencies from 30 mHz up to 1.4 Hz and amplitudes up to 0.8 T at 4.2 K. Using the measured frequency dependence of the total AC losses we determined the contribution of hysteresis and coupling losses. The transverse resistivity determined from the coupling losses is considerably higher than that corresponding to the resistivity of copper stabilization before the tape processing due to diffusion of Ti. From the measured penetration field critical current densities were determined using results of theories for circular as well as rectangular filaments.

• 出版日期2011-7
• 单位中国科学院电工研究所