 High-pressure neutron diffraction study of BaFe 2 As 2J.-E. Jørgensen () and T. C. Hansen The European Physical Journal B: Condensed Matter and Complex Systems, 2010, vol. 78, issue 4, 411-415 Abstract: The crystal structure of BaFe 2 As 2 was studied by high-pressure neutron powder diffraction in the pressure range from ambient to 6.5 GPa as well as in the temperature range from 12 K to 293 K at 4.4 GPa and no pressure or temperature induced phase changes were observed. The compression mechanism of BaFe 2 As 2 was found to be anisotropic as the a- and c-axes are reduced by 2.49 and 3.66%, respectively at 6.5 GPa. Within the FeAs layers the Fe-As and Fe-Fe bonds decrease by 2.49 and 3.66%, respectively. The Ba-As distance decreases by 3.70% while the As-As inter-atomic distance along the c-axis exhibits a complex pressure dependence. The bulk modulus B 0 and its pressure derivative B 0 ' were determined to be B 0 =59(2) GPa and B 0 '=6.1(7) at ambient temperature. Copyright EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2010 Date: 2010 Downloads: (external link) Related works: Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text Persistent link: https://EconPapers.repec.org/RePEc:spr:eurphb:v:78:y:2010:i:4:p:411-415 Ordering information: This journal article can be ordered from DOI: 10.1140/epjb/e2010-10522-1 Access Statistics for this article The European Physical Journal B: Condensed Matter and Complex Systems is currently edited by P. Hänggi and Angel Rubio More articles in The European Physical Journal B: Condensed Matter and Complex Systems from Springer, EDP Sciences |
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