Photoacoustic phase and amplitude spectra of YBa2Cu3O7-delta samples synthesised 18 years ago were measured and numerically analysed. The value of thermal diffusivity obtained on the aged samples was lower than the values obtained for fresh samples. Far infrared spectra of YBa2Cu3O7-delta samples synthesised 18 years ago were recorded and analysed enabling determination of reflectivity peak phonon frequencies present at room temperature. X-ray diffraction analysis and far infrared reflectivity measurements enabled determination of a slight change of the oxygen content with time. The YBa2Cu3O7-delta samples synthesised 18 years ago still remained superconducting, which was confirmed by resistivity measurements of the samples between 50 K and room temperature where the critical temperature was reduced from 93 to 73 K. Atomic force microscopy, scanning electron microscopy and energy dispersive X-ray microanalytical measurements were also performed confirming the composition of the sample.
TY - JOUR
AU - Nikolić, Pantelija M.
AU - Vujatović, Stevan S.
AU - Paraskevopoulos, K.M.
AU - Zorbas, Kostas T.
AU - Savić, Slavica M.
AU - Nikolić, Maria Vesna
AU - Aleksić, Obrad
AU - Ristic, Momcilo M.
PY - 2007
UR - http://rimsi.imsi.bg.ac.rs/handle/123456789/182
AB - Photoacoustic phase and amplitude spectra of YBa2Cu3O7-delta samples synthesised 18 years ago were measured and numerically analysed. The value of thermal diffusivity obtained on the aged samples was lower than the values obtained for fresh samples. Far infrared spectra of YBa2Cu3O7-delta samples synthesised 18 years ago were recorded and analysed enabling determination of reflectivity peak phonon frequencies present at room temperature. X-ray diffraction analysis and far infrared reflectivity measurements enabled determination of a slight change of the oxygen content with time. The YBa2Cu3O7-delta samples synthesised 18 years ago still remained superconducting, which was confirmed by resistivity measurements of the samples between 50 K and room temperature where the critical temperature was reduced from 93 to 73 K. Atomic force microscopy, scanning electron microscopy and energy dispersive X-ray microanalytical measurements were also performed confirming the composition of the sample.
PB - Carl Hanser Verlag, Munich
T2 - International Journal of Materials Research
T1 - Effect of ageing on optical and thermal properties of YBa2Cu3O7-delta
EP - 573
IS - 7
SP - 569
VL - 98
DO - 10.3139/146.101511
ER -
@article{
author = "Nikolić, Pantelija M. and Vujatović, Stevan S. and Paraskevopoulos, K.M. and Zorbas, Kostas T. and Savić, Slavica M. and Nikolić, Maria Vesna and Aleksić, Obrad and Ristic, Momcilo M.",
year = "2007",
abstract = "Photoacoustic phase and amplitude spectra of YBa2Cu3O7-delta samples synthesised 18 years ago were measured and numerically analysed. The value of thermal diffusivity obtained on the aged samples was lower than the values obtained for fresh samples. Far infrared spectra of YBa2Cu3O7-delta samples synthesised 18 years ago were recorded and analysed enabling determination of reflectivity peak phonon frequencies present at room temperature. X-ray diffraction analysis and far infrared reflectivity measurements enabled determination of a slight change of the oxygen content with time. The YBa2Cu3O7-delta samples synthesised 18 years ago still remained superconducting, which was confirmed by resistivity measurements of the samples between 50 K and room temperature where the critical temperature was reduced from 93 to 73 K. Atomic force microscopy, scanning electron microscopy and energy dispersive X-ray microanalytical measurements were also performed confirming the composition of the sample.",
publisher = "Carl Hanser Verlag, Munich",
journal = "International Journal of Materials Research",
title = "Effect of ageing on optical and thermal properties of YBa2Cu3O7-delta",
pages = "573-569",
number = "7",
volume = "98",
doi = "10.3139/146.101511"
}
Nikolić, P. M., Vujatović, S. S., Paraskevopoulos, K.M., Zorbas, K. T., Savić, S. M., Nikolić, M. V., Aleksić, O.,& Ristic, M. M.. (2007). Effect of ageing on optical and thermal properties of YBa2Cu3O7-delta. in International Journal of Materials Research
Carl Hanser Verlag, Munich., 98(7), 569-573.
https://doi.org/10.3139/146.101511
Nikolić PM, Vujatović SS, Paraskevopoulos K, Zorbas KT, Savić SM, Nikolić MV, Aleksić O, Ristic MM. Effect of ageing on optical and thermal properties of YBa2Cu3O7-delta. in International Journal of Materials Research. 2007;98(7):569-573.
doi:10.3139/146.101511 .
Nikolić, Pantelija M., Vujatović, Stevan S., Paraskevopoulos, K.M., Zorbas, Kostas T., Savić, Slavica M., Nikolić, Maria Vesna, Aleksić, Obrad, Ristic, Momcilo M., "Effect of ageing on optical and thermal properties of YBa2Cu3O7-delta" in International Journal of Materials Research, 98, no. 7 (2007):569-573,
https://doi.org/10.3139/146.101511 . .
