Carachterization of new superconductor compounds

 

TITLE

Carachterization of new superconductor compounds

STAFF

G. Arrighetti
L. Barba

CNR MODULE

PM.P06: Enabling technologies for drug discovery
PM.P06.015: Crystallographic methodologies: development and applications
PM.P06.015.003: Development of radiation sources and instrumentations for new generation diffractometry and spectroscopy for structural and functional studies of new materials.

KEYWORDS

Structural phase transition (SPT); X-ray powder diffraction (XRPD); Internal pressure (IP)

COLLABORATIONS
Università di Roma La Sapienza – dipartimento di Fisica
DESCRIPTION

High-temperature superconductive compounds, along with order-disorder phase transitions in La2CuO4 were studied in the past by high-resolution synchrotron X-ray diffraction as a function of temperature and via pump-and probe X-ray experiments, performed at XRD1 beamline at Elettra. Today, the collaboration with the department of Physics of the University of Rome "La Sapienza" continues with a research on a new generation of arsenic-based high-temperature superconductors.
By means of the four-circle K-diffractometer and the new Pilatus detector we can contribute in a much more effective way to the characterization of both single crystals and powder samples by means of high-resolution X-ray diffraction coupled with temperature control and photonic pump-and-probe experiments, detecting diffraction patterns with high dynamic range, high acquisition frequency, low PSF, which allows to elucidate structural transitions with a better signal-to-noise ratio and a time sampling of about 5 milliseconds.

Caivano, R., Fratini, M., Poccia, N., Ricci, A., Puri, A., Ren, Z. -., et al. (2009). Feshbach resonance and mesoscopic phase separation near a quantum critical point in multiband FeAs-based superconductors. Superconductor Science and Technology, 22(1)

Fratini, M., Caivano, R., Puri, A., Ricci, A., Ren, Z. -., Dong, X. -., et al. (2008). The effect of internal pressure on the tetragonal to monoclinic structural phase transition in ReOFeAs: The case of NdOFeAs. Superconductor Science and Technology, 21(9)

Fratini, M., Campi, G., Barba, L., Busby, Y., Filippi, M., Prellier, W., et al. (2007). Manipulation of mesoscopic phase separation by X-ray illumination. Journal of Superconductivity and Novel Magnetism, 20(7-8), 551-554.

Campi, G., Di Castro, D., Dell'Omo, C., Agrestini, S., Saini, N. L., Bianconi, A., et al. (2003). Temperature and x-ray illumination effects in oxygen doped La2CuO4. International Journal of Modern Physics B, 17(4-6 II), 836-841.

Bianconi, A., Agrestini, S., Di Castro, D., Campi, G., Zangari, G., Saini, N.L., Saccone, A., De Negri, S., Giovannini, M., Profeta, G., Continenza, A., Satta, G., Massidda, S., Cassetta, A., Pifferi, A., Colapietro, M. (2002) Physical Review B - Condensed Matter and Materials Physics, Volume 65, Issue 17, Article number 174515, 1745151-1745155

Di Castro, D., Bianconi, G., Colapietro, M., Pifferi, A., Saini, N.L., Agrestini, S., Bianconi, A.,Evidence for the strain critical point in high Tc superconductors (2000) European Physical Journal B Volume 18, Issue 4, 617-624

CONTACTS
Luisa Barba
Email : luisa.barbaATic.cnr.it
Tel. : 0403758518/8355

Last Updated (Wednesday, 27 October 2010 15:41)