Neutron Scattering - JUWEL - Forschungszentrum Jülich

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POWDER DIFFRACTOMETER SPODI 23 Experiment In the frame of the practical course, the temperature-dependent phase transformation behavior of a PbZr1-xTixO3 with a composition on the tetragonal side should be investigated. Diffraction patterns at different temperature steps between room temperature and 600 °C will be collected with a vacuum high-temperature furnace. The structural changes at different temperatures will be investigated by an analysis of the lattice parameters. Based on the experimental data, the relations between the structural changes and the corresponding physical properties can be discussed. Following experimental procedures will be carried out � sample preparation, filling the sample material into a sample can, adjustment of the sample stick, installation of the sample stick into the furnace � short test measurement to check the sample adjustment and data quality � editing a program to run the data collection at various temperatures and starting the scans � data reduction: Derivation of diffraction patterns from the two-dimensional raw data � data analysis: analysis of the lattice parameter changes as a function of temperature � discussing the results with respect to structure – properties relationships Literature [1] V. K. Pecharsky, P. Y. Zavalij, Fundamentals of Powder Diffraction and structural Characterisation of Materials (2003). [2] G. L. Squires, Introduction to the Theory of Thermal Neutron Scattering, Dover Reprints (1978). [3] C. Kittel, Einführung in die Festkörperphysik, 10. Edition, Oldenbourg (1993). [4] H. Dachs, Neutron Diffraction, Springer Verlag (1978). [5] H. Ibach und H. Lüth, Festkörperphysik, Einführung in die Grundlagen, 6. Edition, Springer Verlag (2002). [6] J.R.D. Copley, The Fundamentals of Neutron Powder Diffraction (2001), http://www.nist.gov/public_affairs/practiceguides/SP960-2.pdf. [7] A. D. Krawitz, Introduction to Diffraction in Materials Science and Engineering. [8] W. Kleber, Einführung in die Kristallographie, Oldenbourg (1998).
24 POWDER DIFFRACTOMETER SPODI Contact SPODI Web: http://www.frm2.tum.de/wissenschaftlichenutzung/diffraktion/spodi/index.html Dr. Markus Hoelzel Forschungsneutronenquelle Heinz Maier-Leibnitz (FRM II) Technische Universität München Phone: 089/289-14314 e-Mail: markus.hoelzel@frm2.tum.de Dr. Anatoliy Senyshyn Forschungsneutronenquelle Heinz Maier-Leibnitz (FRM II) Technische Universität München Phone: 089/289-14316 e-Mail: anatoliy.senyshyn@frm2.tum.de
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DNS 3 1 Introduction Polarized neut
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DNS 5 Monochromator horizontal- and
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DNS 7 3 Preparatory Exercises The p
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DNS 9 important and always necessar
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KWS-3 3 1 Introduction Ultra small
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KWS-3 5 2. The standard Q-range of
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KWS-3 7 Table 2. Samples for practi
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KWS-3 9 References [1] Eskilden, M.
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________________________ RESEDA Res
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RESEDA 3 1 Introduction Neutrons ar
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RESEDA 5 various length values l ac
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RESEDA 7 In this expression, a norm
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RESEDA 9 spin flip from up to down
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RESEDA 11 The neutrons are counted
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