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Muon Spin Rotation Studies of the Vortex Matter in the High-T_{c} Superconductor Bi_{2}Sr_{2}CaCu_{2}O_{8+δ}

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Blasius T., Niedermayer C., Tallon J., Pooke D., Golnik A., Noakes D., Stronach C., Ansaldo E., Henn R., Lin C., Bernhard C.

Acta Physica Polonica A

1999

vol. 96

issue 2

245-258

We report muon spin rotation studies of the magnetic field distribution n(B) in the vortex state of the high-temperature superconductor Bi_{2}Sr_{2}CaCu_{2}O_{8+δ}. From our data on three sets of overdoped, nearly optimized and underdoped single crystals we obtain evidence for a two-stage melting process of the vortex matter under equilibrium conditions. In the irreversible regime well below the irreversibility line we observe a transition in the vortex state which we associate with an intra-planar melting transition. The resulting flux-line liquid phase persists over a sizeable temperature interval before the inter-planar decoupling of the individual vortex lines takes place in a second step at the irreversibility line, resulting in a pancake liquid phase.

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1 Acta Physica Polonica A

1 1999

1 Ansaldo E.

1 Bernhard C.

1 Blasius T.

1 Golnik A.

1 Henn R.

1 Lin C.

1 Niedermayer C.

1 Noakes D.

1 Pooke D.

1 Stronach C.

1 Tallon J.

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Muon Spin Rotation Studies of the Vortex Matter in the High-T_{c} Superconductor Bi_{2}Sr_{2}CaCu_{2}O_{8+δ}