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Collective electromagnetic wave excitation in Bi2Sr2CaCu2O8+δin magnetic field nearly parallel to the CuO2-planes

Authors
Journal
Physica C Superconductivity
0921-4534
Publisher
Elsevier
Publication Date
Identifiers
DOI: 10.1016/s0921-4534(97)01279-3

Abstract

Abstract The angular dependence of the microwave resonant absorption of Bi 2Sr 2CaCu 2O 8+δ in magnetic field was measured by angular alignment with ∼0.02° precision. When the angle θ between the field and the CuO 2-plane is tilted from the c-axis, the resonance field scales as B sinθ in the range θ > 4°. A disappearance of the resonance is unexpectedly observed for angles within θ∼0.13°. Possible origin of the phenomena is discussed.

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