EPR and josephson absorption in YBaCuO high temperature superconductor

Stankowski, J.; Pichet, J.; Poole, Charles P.; Datta, Timir; Kahol, Pawan K.; Dalal, Naresh S.; Moodera, J. S.; Heller, J. E. Drum; Hutton, Stuart L.; Rubins, R. S.

doi:10.1080/00150198808215910

Cited by 7 publications

(8 citation statements)

References 2 publications

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“…However (for T < 77 K) Bc1 observed as Bmax decreases with increasing amplitude of the oscillating microwave field. This effect has been reported already in [15]. Three lines decsribed by Eq.…”

Section: Experimentai Details and Resultssupporting

confidence: 80%

The Influence of the Microwave Power on Josephson Microwave Absorption in High- Temperature Superconductors

Czyżak

Stankowski

1991

Acta Phys. Pol. A

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The influence of the microwave power on the internal Josephson Junction System (JJS) in granular high T, superconductors was investigated using EPR methodology. Josephson Microwave Absorption signal was used to monitor local temperature of the Josephson Junction System while the bulk sample temperature was measured by a thermocouple. The effect of the JJS overheating is discussed as the consequence of an interaction between JJS, microwave field and the bulk sample.

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Section: Experimentai Details and Resultssupporting

confidence: 80%

The Influence of the Microwave Power on Josephson Microwave Absorption in High- Temperature Superconductors

Czyżak

Stankowski

1991

Acta Phys. Pol. A

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“…The superconducting sample can be treated as a network of weak links and superconducting loops in terms of the [36] (squares) and the peak-to-peak line-width of the microwave absorption derivative observed by Stankowski et al [14] in ceramic YBa 2 Cu 3 O x (dots). The results are fitted according to equations ( 5), ( 6) and ( 9) for SNS junctions and equations ( 5)-( 8) for SIS junctions respectively.…”

Section: Ceramicsmentioning

confidence: 99%

“…The microwave absorption derivative (MMMA signal) as a function of temperature in a constant external magnetic field is shown in figure 5. The experimental results reported by Stankowski et al [14] are fitted according to equation (5). The temperature dependence of the microwave absorption line-width shows a significantly different behaviour in single crystals, and in ceramics.…”

Section: Temperature Dependencementioning

confidence: 99%

“…The magnetic field dependence of the high-frequency dissipation has been measured by many authors using standard electron paramagnetic resonance methodology at microwave frequencies [10][11][12][13][14][15][16]. In these experiments, a superconducting sample is usually located in a cavity at the maximum of the magnetic component of the microwave field, which is applied perpendicularly to the external, stationary magnetic field.…”

Section: Introductionmentioning

confidence: 99%

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Microwave absorption in high- superconductors in low magnetic fields

Czyżak¹

1996

Supercond. Sci. Technol.

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The existence of inter-and intragrain weak links strongly influences the microwave properties of high-temperature superconductors. Considering the properties of a network of resistively shunted, symmetric double contacts, we obtain a consistent description of the high-frequency dissipation in ceramics and single crystals in low magnetic fields. In this model, the temperature dependence of the high-frequency dissipation is determined by the critical current of the weak links and by the penetration depth. The high-frequency absorption line-width decreases when the penetration depth increases with temperature. The results of the measurements of magnetically modulated microwave absorption in single crystals and ceramics are interpreted in terms of the model presented.

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“…These discontinuities can be explained in a following way. Even for the Y-123 sintered sample, the effective sufface Se~ of the Josephson circuits has a certain discrete value [9,15] due to texture of the granular sample. Because the effective surface is connected with magnetic flux, cp----BSeff.…”

Section: Temperature Dependence Of Mmmamentioning

confidence: 99%

Microwave absorption in high-Tc superconductors studied by the EPR method

Stankowski

Czyżak

1991

Appl Magn Reson

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Dependences of the microwave absorption on temperature, magnetic field and microwave power obtained for the high-Tr superconductors are presented. Shape of the magnetically modulated microwave absorption, low-field phase diagram and overheating of the Josephson junction system induced by microwave irradiation are discussed. The model of the Josephson junction system interacting with microwaves has been used to explain the behavior of the high-T e superconductors in low magnetic field.

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EPR and josephson absorption in YBaCuO high temperature superconductor

Cited by 7 publications

References 2 publications

The Influence of the Microwave Power on Josephson Microwave Absorption in High- Temperature Superconductors

The Influence of the Microwave Power on Josephson Microwave Absorption in High- Temperature Superconductors

Microwave absorption in high- superconductors in low magnetic fields

Microwave absorption in high-Tc superconductors studied by the EPR method

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