Wide temperature scaling law of the secondary peak observed in magnetization curves of single crystals (La,Sr)2CuO4

12 April 1993

journal article
research article
Published by AIP Publishing in Applied Physics Letters

Vol. 62 (15) , 1830-1832
https://doi.org/10.1063/1.109563

Abstract

Magnetization curves of single crystals (La_1−xSr_x)₂CuO₄ with various Sr contents were measured. A distinct increase of magnetization with increasing applied field was observed in Sr overdoped compositions, when the magnetic field was applied perpendicular to the CuO₂ plane. The field, B_pk , where magnetization showed a maximum value, was strongly dependent on temperature. Its dependence was expressed by a universal relation √B_pk = c(x)[1−T/T_c(x)] over a wide temperature range; between 4.2 K and T_c. Possible mechanisms which give rise to the observed distinct secondary peak effect are discussed.

Keywords

This publication has 9 references indexed in Scilit:

Flux pinning by ordered oxygen-deficient phases in nearly stoichiometric YBa2Cu3O7−δ single crystals
Applied Physics Letters, 1992
Compositional dependence of transport anisotropy in large (La, Sr)2CuO4 single crystals and second peak in magnetization curves
Physica C: Superconductivity and its Applications, 1992
Percolation effects and oxygen inhomogeneities in ${YBa}_{2}$ ${Cu}_{3}$ $O_{7 - δ}$ crystals
Physical Review B, 1992
Anisotropic magnetization, flux pinning and critical current density of La-Sr-Cu-O single crystal
Superconductor Science and Technology, 1992
Electron irradiation effect on the double hump magnetization loop in BSCCO crystals
Physica C: Superconductivity and its Applications, 1991
The role of surface effects in magnetization of high-Tc superconductors
Physica C: Superconductivity and its Applications, 1990
Oxygen-defect flux pinning, anomalous magnetization and intra-grain granularity in YBa2Cu307–δ
Nature, 1990
Thermal fluctuations of vortex lines, pinning, and creep in high- $T_{c}$ superconductors
Physical Review B, 1990
Flux vortices and transport currents in type II superconductors
Advances in Physics, 1972