论文信息 - The extended Bean critical state model for superconducting 3-axes ellipsoid and its application for obtaining the bulk critical field Hc1 and the pinning current Jc in high-Tc superconducting single crystals

The extended Bean critical state model for superconducting 3-axes ellipsoid and its application for obtaining the bulk critical field Hc1 and the pinning current Jc in high-Tc superconducting single crystals

Abstract The method of determination of the pinning current density J c and the bulk first critical field H c1 from the magnetization data of high T c superconducting single crystals is presented. The method is based on the original critical state model regarding the shape of the sample, the change of the demagnetization factor with flux penetration, real distribution of the magnetic field and equilibrium flux density within the sample. The method was applied to Tl 2 Ba 2 CaCu 2 O x single crystals.

V. V. Ryazanov | V. M. Krasnov | V. A. Larkin | V. Krasnov | V. Ryazanov

[1] M. P. Kulakov,et al. Direct study of magnetic flux penetration and trapping in HTSC , 1990 .

[2] Gyorgy,et al. Magnetic characterization of rare-earth barium cuprate superconductors. , 1987, Physical review. B, Condensed matter.

[3] C. P. Bean. Magnetization of hard superconductors , 1962 .

[4] P. Gougeon,et al. Magnetization jumps and critical current of YBa2Cu3O7 single crystal , 1988 .

[5] Malozemoff,et al. Temperature dependence of lower critical fields in Y-Ba-Cu-O crystals. , 1989, Physical review. B, Condensed matter.

[6] H. Ullmaier. Irreversible Properties of Type II Superconductors , 1975 .

[7] V. Krasnov,et al. Diamagnetic properties of the organic superconductor κ-(BEDT-TTF)2Cu(NCS)2 , 1990 .

[8] J. E. Evetts,et al. Flux vortices and transport currents in type II superconductors , 2001 .

[9] C. P. Bean,et al. Magnetization of High-Field Superconductors , 1964 .

[10] K. Kitazawa,et al. DC susceptibility of type-II superconductors in field-cooled processes , 1990 .

[11] A. Koshelev,et al. The role of surface effects in magnetization of high-Tc superconductors , 1990 .

[12] Campbell,et al. Exponential H and T decay of the critical current density in YBa2Cu3O7- delta single crystals. , 1988, Physical review. B, Condensed matter.

[13] A. Zhukov,et al. Temperature dependences of the first critical field and critical current in the untwinned TmBa2Cu3Ox superconducting single crystals , 1990 .