Electromagnetic Properties of Melt-Grown YBaCuO Superconductors Doped by Gd and Sm

• Authors: M. Jirsa , M. Rameš , D. Volochová , M. Radušovská , P. Diko
• Languages of publication: EN

Abstracts

EN

Electromagnetic properties of YBa_{2}Cu_{3}O_{y} samples melt-grown in air and doped with small amounts of light rare earth (LRE) ions Gd and Sm were studied. The LRE doping creates a point-like disorder contributing to the second peak on the magnetization curve. In the field range of the second peak the average magnetic moment, M_{av}, deduced from the magnetization curves exhibited strong fluctuations. M_{av} is commonly regarded as an equilibrium moment close to the thermodynamic reversible one, obeying in intermediate fields a logarithmic field dependence. However, in our experiments M_{av}(B) curves failed to follow such a dependence below irreversibility line. M_{av}(B) curves deduced from rather static measurements, done by SQUID magnetometer still showed the disturbance but significantly weaker. It indicates that this feature reflects the vortex dynamics in the second peak region. Its scaling with temperature was found to coincide with that of the pinning force.

Keywords

EN

74.25.Ha; 74.25.Op; 74.25.Sv; 74.60.Ge; 74.72.-h

Discipline

• 74.72.-h: Cuprate superconductors
• 74.25.Ha: Magnetic properties including vortex structures and related phenomena(for vortices, magnetic bubbles, and magnetic domain structure, see 75.70.Kw)
• 74.25.Op: Mixed states, critical fields, and surface sheaths
• 74.25.Sv: Critical currents

• Journal: Acta Physica Polonica A
• Year: 2014
• Volume: 126
• Issue: 1
• Pages: 326-327

Dates

published

2014-07

Contributors

author

M. Jirsa

• Institute of Physics, ASCR, Na Slovance 2, CZ-182 21 Praha 8, Czech Republic

author

M. Rameš

• Institute of Physics, ASCR, Na Slovance 2, CZ-182 21 Praha 8, Czech Republic

author

D. Volochová

• Institute of Experimental Physics SAS, Watsonova 47, 040 01 Košice, Slovakia

author

M. Radušovská

• Institute of Experimental Physics SAS, Watsonova 47, 040 01 Košice, Slovakia

author

P. Diko

• Institute of Experimental Physics SAS, Watsonova 47, 040 01 Košice, Slovakia

References

• [1] Z. Hao, J.R. Clem, Phys. Rev. Lett. 67, 2371 (1991), doi: 10.1103/PhysRevLett.67.2371
• [2] M. Jirsa, M. Rameš, M. Muralidhar, D. Volochová, P. Diko, Physics Procedia 45, 65 (2013), doi: 10.1016/j.phpro.2013.04.053
• [3] M. Jirsa, M. Rameš, Th. Wolf, J. Phys: Conf. Series 400, 022039 (2012), doi: 10.1088/1742-6596/400/2/022039
• [4] M. Jirsa, M. Rameš, Ch. Marcenat, Th. Wolf, J. Supercond. Novel Magn. 26, 901 (2013), doi: 10.1007/s10948-012-1843-3

Identifiers

DOI

10.12693/APhysPolA.126.326