Magnetostriction of a granular superconductor
S. Sergeenkov, M. Ausloos
DOI 10.1103/PhysRevB.48.604 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
An exactly solvable model for the magnetostriction (MS) of a granular superconductor is presented. Both the ‘‘bulk-modulus-driven magnetostriction’’ (the change of the sample’s volume in the magnetic free energy upon the applied stress) and the ‘‘change-of-phase magnetostriction’’ (due to the stress dependence of the weak-links-induced magnetization) are considered. It is found that the former contribution to MS dominates at small magnetic fields (in a Meissner phase of granular superconductor) while the latter one prevails at higher fields when the motion of Josephson vortices over grain boundaries is established. A useful link between MS and grain-boundary-pinning ability is obtained within the model. From magnetostriction measurements, this allows one to get rather unique information on the temperature and magnetic-field dependence of the weak-link pinning-force density and its field derivative. Analogy with the behavior of MS in the mixed state of type-II superconductors is stressed, and comparison of the model predictions with some experimental data on high-Tc ceramics is discussed.
Similar papers
Magneto-elastic coupling model of deformable anisotropic superconductors
similarity 0.89Yingxu Li et al. · 2017 · arXiv:1704.01827
Source status unknown — claims are unverified
Magnetoresistance of granular superconducting metals in a strong magnetic field
similarity 0.89I. S. Beloborodov et al.
Source status unknown — claims are unverified
Weak-link magnetically modulated resistance response in granular superconducting systems
similarity 0.88Taner Edis & Kishin Moorjani
Source status unknown — claims are unverified
Temperature dependence of the low-field magnetization of granular superconductors
similarity 0.88M. Ambrico et al.
Source status unknown — claims are unverified
Magnetic Flux Trapping in Granular HTSC near Superconducting Transition
similarity 0.88A. A. Sukhanov et al. · 2002 · arXiv:cond-mat/0208226
Source status unknown — claims are unverified
Giant magnetostriction in Bi2Sr2CaCu2O8 single crystal in the superconducting state and its mechanism
similarity 0.88H. Ikuta et al.
Source status unknown — claims are unverified