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RESEARCH PRODUCT
Harmonic emission at microwave frequencies in YBa2Cu3O7 single crystals near Tc
A. Agliolo GallittoM. Li Vignisubject
Materials scienceHigh-temperature superconductivityCondensed matter physicsEnergy Engineering and Power TechnologyFunction (mathematics)Condensed Matter PhysicsTwo-fluid modelElectronic Optical and Magnetic Materialslaw.inventionPower (physics)Magnetic fieldNonlinear systemlawCondensed Matter::SuperconductivityHarmonicElectrical and Electronic EngineeringMicrowavedescription
Abstract Nonlinear microwave emission by YBa 2 Cu 3 O 7 single crystals is investigated at temperatures close to T c . Second- and third-harmonic signals are studied as a function of the temperature and input power, for different values of the external magnetic field. The results are discussed in the framework of a phenomenological theory based on the two-fluid model which assumes that both the microwave and static fields perturb the partial concentrations of the normal and condensate fluids. It is suggested that, at temperatures very close to T c , this mechanism is the only one responsible for the harmonic emission by YBa 2 Cu 3 O 7 single crystals in the Meissner state. It is also effective in the mixed state where the nonlinearity mechanism suggested by Coffey may play a role.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1998-09-01 | Physica C: Superconductivity |