MIRKOVIC, Jovan; BUZDIN, Alexandre I.; KASHIWAGI, Takanari; YAMAMOTO, Takashi; KADOWAKI, Kazuo

doi:10.1016/j.physc.2012.03.066

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MIRKOVIC, Jovan
National Institute for Materials Science [NIMS]
Faculty of Sciences

BUZDIN, Alexandre I.
Laboratoire Ondes et Matière d'Aquitaine [LOMA]
Institut universitaire de France [IUF]

KASHIWAGI, Takanari
National Institute for Materials Science [NIMS]

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Physica C: Superconductivity and its Applications. 2013, vol. 484, p. 77-80

Elsevier

Résumé en anglais

In extremely anisotropic layered superconductors of Bi2Sr2CaCu2O8+δ the stacks of vortex pancakes (PV) and the Josephson vortex (JV) interpenetrate, and due to PV-JV mutual pinning energy, weakly interact and form various tilted and crossing lattice structures including vortex chains, stripes, mixed chain + lattice phases, etc. In order to study these phenomena, it is decisive to have excellent quality of samples and the ideal experimental techniques. The vortex phases in high-quality Bi2Sr2CaCu2O8+δ single crystals were studied by in-plane resistivity measurement and local ac magnetic permeability. The sharp crossover was shown by both techniques, deep in the vortex solid state separating the Abrikosov dominant 'strong pinning' phase from the Josephson dominant 'weak pinning' phase. Those two vortex states were recognized as the mixed chain + lattice vortex phase and chains (tilted) vortex phase, respectively.< Réduire

Mots clés en anglais

Vortex phase diagram

Crossing lattices

c-Axis resistance

Bi2Sr2CaCu2O8+d

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Crossover from crossing to tilted vortex phase in Bi2Sr2CaCu2O8+δ single crystals near ab-plane

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