Critical current reduction in coated conductors when in-plane fields are applied

Th. Lécrevisse (1) , J.-M. Rey (1) , Y. Thimont (2) , P. Bernstein (2) , C. Mcloughlin (3)

1 DACM - Département des Accélérateurs, de Cryogénie et de Magnétisme (ex SACM)
2 CRISMAT - Laboratoire de cristallographie et sciences des matériaux
3 DCU - Dublin City University [Dublin]

We report measurements of the critical current of two commercial coated conductors at low temperatures when in-plane magnetic fields up to 15 T are applied. The comparison between the two samples suggests that the presence of a magnetic substrate may have a detrimental effect, at least at low and medium fields. Nevertheless, the critical current density at 30 K and 15 T is in the range of that measured in self field at 77 K. We ascribe its reduction in presence of the field to inter-vortex forces.

Mots clés: Magnetic field; Yba2cu3o7-Detla; Losses; High-temperature superconductors; Thin films; Ni-alloy substrate; Flux penetration; Crystallographic defects; Heterostructures; Superconductivity; Quantum vortices; Superconductors; Electrostatics; Magnetic fields; Electromagnetism; Ferromagnetic materials

Domaines: Physique [physics]

Th. Lécrevisse, J.-M. Rey, Y. Thimont, P. Bernstein, C. Mcloughlin. Critical current reduction in coated conductors when in-plane fields are applied. Journal of Applied Physics, 2012, 112 (7), pp.073918. ⟨10.1063/1.4757929⟩. ⟨hal-01143000⟩