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A modulated structure derived from the XA-type Mn2RuSn Heusler compound.

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Titel: A modulated structure derived from the XA-type Mn2RuSn Heusler compound.
Autoren: Xing-Zhong Li, Wen-Yong Zhang, Skomski, Ralph, Sellmyer, David
Quelle: Acta Crystallographica Section B: Structural Science, Crystal Engineering & Materials; Jun2022, Vol. 78 Issue 3, Part 1, p485-489, 5p
Schlagwörter: X-ray powder diffraction, DIFFRACTION patterns, ELECTRON diffraction, TRANSMISSION electron microscopy
Abstract: A modulated structure derived from the inverse Heusler phase (the XA-type and the disordered variant L21B-type) has been observed in rapidly quenched Mn2RuSn ribbons. The powder X-ray diffraction pattern of the quenched ribbons can be indexed as an L21B-type structure. Electron diffraction patterns of the new structure mostly resemble those of the XA-type (and the disordered variant L21B-type) structure and additional reflections with denser spacing indicate a long periodicity. Orthogonal domains of the modulated structure were revealed by a selected-area electron diffraction pattern and the corresponding dark-field transmission electron microscopy images. The structure was further studied by the crystallographic analysis of high-resolution transmission electron microscopy images. A model for the modulated structure has been proposed to interpret the experimental results. [ABSTRACT FROM AUTHOR]
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Beschreibung
Abstract:A modulated structure derived from the inverse Heusler phase (the XA-type and the disordered variant L2<subscript>1</subscript>B-type) has been observed in rapidly quenched Mn<subscript>2</subscript>RuSn ribbons. The powder X-ray diffraction pattern of the quenched ribbons can be indexed as an L21B-type structure. Electron diffraction patterns of the new structure mostly resemble those of the XA-type (and the disordered variant L2<subscript>1</subscript>B-type) structure and additional reflections with denser spacing indicate a long periodicity. Orthogonal domains of the modulated structure were revealed by a selected-area electron diffraction pattern and the corresponding dark-field transmission electron microscopy images. The structure was further studied by the crystallographic analysis of high-resolution transmission electron microscopy images. A model for the modulated structure has been proposed to interpret the experimental results. [ABSTRACT FROM AUTHOR]
ISSN:20525192
DOI:10.1107/S205252062200333X