X-ray diffraction studies of thermal-expansion with the use of 1D detectors installed at synchrotron beamlines

Roman Minikayev 3Wojciech Paszkowicz 3Paweł Piszora 2Michael Knapp 5Carsten Baehtz 5Jianzhong Jiang 1,6Yngve Cerenius 4

1. Department of Physics, Technical University of Denmark, Building 307, Lyngby DK-2800, Denmark
2. Adam Mickiewicz University, Faculty of Chemistry, Grunwaldzka 6, Poznań 60-780, Poland
3. Polish Academy of Sciences, Institute of Physics, al. Lotników 32/46, Warszawa 02-668, Poland
4. Lund University, MAX-lab, Lund SE-221 00, Sweden
5. Technische Universität Darmstadt, Institute of Materials Science, Petersenstr. 23, Darmstadt 64287, Germany
6. Zhejiang University (ZJU), Zhe Da Lu 38, Hangzhou 310027, China

Abstract

Thermal expansion studies using powder diffraction methods require long measurement time at classical sources. This can be improved by using combination o synchrotron X-ray source with a position sensitive counter. Experimental setting of this type should enable wavelength calibration, in order to eliminate possible, even small, wavelength instabilities: this goal can be achieved using a suitable internal standard [1]. In this presentation, examples of unit-cell size dependence on temperature determined at synchrotron beamlines with the use of linear imaging plate detectors will be demonstrated. The measurements were carried out at powder diffractometers at the B2 beamline at Hasylab/DESY (Hamburg, Germany) [2] and at I711 beamline at MAXlab Laboratory (Lund, Sweden) [3]. For structure refinement, the Fullprof program [4] was applied. Using the position sensitive detectors is found to ascertain a fst and accurate determination of thermal expansion behavior.

References:
[1] W. Paszkowicz, M. Knapp, C. Bähtz, R. Minikayev, P. Piszora, J.Z. Jiang, R. Bacewicz, J. Alloys Compds (2004),in press
[2] M. Knapp, C. Baehtz, H. Ehrenberg, H. Fuess; J. Synchr. Radiat. 11, 4 (2004) 328-334
[3] Y. Cerenius, T. Ursby, S. Carlsson, Synchr. Radiat. Nat. Sci. 3, 1-2 (2004) 3-16
[4] J. Rodriguez-Carvajal, Newslett. IUCr Commission Powd. Diffr. 26 (2001) 12-19

 

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Presentation: poster at E-MRS Fall Meeting 2004, Symposium D, by Roman Minikayev
See On-line Journal of E-MRS Fall Meeting 2004

Submitted: 2004-07-30 20:25
Revised:   2009-06-08 12:55