Activation Energy of the Photo Induced Q2 Oxygen Ordered Phase in the La2CuO4.08 Superconductor. Fratini, M., Campi, G., Simonelli, L., Palmisano, V., Agrestini, S., Filippi, M., Saini, N. L., & Bianconi, A. Journal of Superconductivity, 18(5-6):671–674, November, 2005. Paper doi abstract bibtex The interstitial oxygen ordering in a La2CuO4+ y (y = 0.08) single crystal with a T c = 38 K has been investigated. We have studied the growth dynamics of the three dimensional (3D) ordered phase, called Q2, at different temperatures under X-ray illumination. The critical temperature T 0∼334 K of the order-disorder transition for the Q2 phase has been determined. We have found that the illumination of the sample with a continuous polarized synchrotron radiation X-ray flux stimulates the oxygen ordering kinetics. The photoinduced ordering process shows a threshold characteristic of cooperative phenomena and its kinetics shows a temperature dependence that is controlled by the activation energy E A = 100 meV.
@article{fratini_activation_2005,
title = {Activation {Energy} of the {Photo} {Induced} {Q}2 {Oxygen} {Ordered} {Phase} in the {La}2CuO4.08 {Superconductor}},
volume = {18},
url = {http://dx.doi.org/10.1007/s10948-005-0056-4},
doi = {10.1007/s10948-005-0056-4},
abstract = {The interstitial oxygen ordering in a La2CuO4+ y (y = 0.08) single crystal with a T c = 38\ K has been investigated. We have studied the growth dynamics of the three dimensional (3D) ordered phase, called Q2, at different temperatures under X-ray illumination. The critical temperature T 0∼334\ K of the order-disorder transition for the Q2 phase has been determined. We have found that the illumination of the sample with a continuous polarized synchrotron radiation X-ray flux stimulates the oxygen ordering kinetics. The photoinduced ordering process shows a threshold characteristic of cooperative phenomena and its kinetics shows a temperature dependence that is controlled by the activation energy E A = 100\ meV.},
number = {5-6},
journal = {Journal of Superconductivity},
author = {Fratini, M. and Campi, G. and Simonelli, L. and Palmisano, V. and Agrestini, S. and Filippi, M. and Saini, N. L. and Bianconi, A.},
month = nov,
year = {2005},
keywords = {lacuoo, uv, writing},
pages = {671--674}
}
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