Negative in-plane and out-of-plane magnetoresistivities in optimally doped Bi2Sr2Ca0.8Y0.2Cu2O8+d single crystal

Details Negative in-plane and out-of-plane magnetoresistivities in optimally doped Bi2Sr2Ca0.8Y0.2Cu2O8+d single crystal Negative in-plane and out-of-plane magnetoresistivities in optimally doped Bi2Sr2Ca0.8Y0.2Cu2O8+d single crystal

2000-03-09

arxiv.org/abs/cond-mat/0003149v1

Physics

Condensed Matter

Superconductivity

4 pages, 3 figures accepted for publication in Physical Revue B

Scientific paper

10.1103/PhysRevB.62.5378

Both the in-plane and out-of-plane magnetoresistivities have been measured in the normal state of an optimally doped Bi2Sr2Ca0.8Y0.2Cu2O8+d single crystal with a magnetic field applied parallel and perpendicular to the CuO2 planes. Whatever the magnetic field and the current directions are, a negative magnetoresistivity is obtained over a wide range of temperature above the critical temperature Tc. For the in-plane and out-of-plane measurements, the non-dominant orbital contribution to magnetoresistivity suggests the substantial role played by the spin degrees of freedom.

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