Pressure study of Tc and Josephson absorption in YBa2Cu3O7−λ and Tl-Ca-Ba-Cu-O superconductors

Stankowski, J.; Czyżak, B.; Krupski, M.; Baszyński, J.; Datta, Timir; Almasan, C. C.; Sheng, Ζ. Z.; Hermann, A. M.

doi:10.1016/0921-4534(89)90188-3

Cited by 18 publications

(11 citation statements)

References 18 publications

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“…According to Ref. 28 the Josephson projected area S was found to slightly decrease under pressure thus leading to some increase of the characteristic field H 0 = Φ 0 /S. In view of Eq.…”

mentioning

confidence: 88%

Piezomagnetism and stress-induced paramagnetic Meissner effect in mechanically loaded high-T c granular superconductors

Sergeenkov

1999

Jetp Lett.

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Two novel phenomena in a weakly coupled granular superconductor under an applied stress are predicted which are based on recently suggested piezophase effect (a macroscopic quantum analog of the piezoelectric effect) in mechanically loaded grain boundary Josephson junctions. Namely, we consider the existence of stress induced paramagnetic moment in zero applied magnetic field (piezomagnetism) and its influence on a low-field magnetization (leading to a mechanically induced paramagnetic Meissner effect). The conditions under which these two effects can be experimentally measured in high-Tc granular superconductors are discussed.

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“…According to Ref. 28 the Josephson projected area S was found to slightly decrease under pressure thus leading to some increase of the characteristic field H 0 = Φ 0 /S. In view of Eq.…”

mentioning

confidence: 88%

Piezomagnetism and stress-induced paramagnetic Meissner effect in mechanically loaded high-T c granular superconductors

Sergeenkov

1999

Jetp Lett.

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“…When the sample is irradiated by the microwaves, we observe a shift of the temperature Tceff( d e f i n e d a s t h e t e m p e r a t u r e at which the JMA signal appears or disappears). An analogous effect was observed in the investigations of granular classical superconductors, such as Pb and Nb [9][10][11][12][13]14]. The sample irradiation by microwaves was found to cause a splitting in the JMA line.…”

Section: Introductionmentioning

confidence: 66%

“…The bulk sample temperature was measured by Cu-Constantan thermocouple glued directly to the sample. The spectrometer magnet was replaced by Helmholtz coils [8,12] fed by a triangular current signal from a generator and amplifier, yielding magnetic field B0 sweep of an amplitude of ±50 G. Magnetic field of second modulation at 100 kHz was also applied. The sample temperature was stabilized with an accurancy of 0.3 K. All measurements were carried out at a very small (10 -3 s) time constant of the electronic receiver of the EPR spectrometer.…”

Section: Experimentai Details and Resultsmentioning

confidence: 99%

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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“…In a totally different interpretation, the MMMA signal near T c is principally due to contribution from the weak links [18][19][20]. These weak links are believed to originate at the twin boundaries and other thin defect planes.…”

Section: The Temperature-scan Experimentsmentioning

confidence: 99%

Magnetically modulated microwave absorption in cuprate superconductors

Tyagi

1995

Appl. Magn. Reson.

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Abstraet. Magnetically modulated microwave absorption (MMMA) is a highly sensitive microprobe, which is increasingly being used to extract a variety of information about the flux dynamics in the high-transition-temperature superconductors. The correspondence between the information obtained from the MMMA and the directly monitored (without modulation) field-induced microwave absorption techniques is discussed. The validity of some of the commonly held views about the features that characterize the MMMA signal are examined.

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Pressure study of Tc and Josephson absorption in YBa2Cu3O7−λ and Tl-Ca-Ba-Cu-O superconductors

Cited by 18 publications

References 18 publications

Piezomagnetism and stress-induced paramagnetic Meissner effect in mechanically loaded high-T c granular superconductors

Piezomagnetism and stress-induced paramagnetic Meissner effect in mechanically loaded high-T c granular superconductors

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

Magnetically modulated microwave absorption in cuprate superconductors

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