A modulated structure derived from the XA-type Mn2RuSn Heusler compound.
Xing Zhong Li1, Wen Yong Zhang2, Ralph Skomski1
1Nebraska Center for Materials and Nanoscience, University of Nebraska, Lincoln, NE 68588, USA.
Summary
Researchers discovered a novel modulated structure in rapidly quenched Mn2RuSn ribbons, related to the inverse Heusler phase. This finding, observed via X-ray and electron diffraction, reveals complex structural ordering in this material.
Area of Science:
- Materials Science
- Solid State Physics
- Crystallography
Background:
- Inverse Heusler compounds exhibit complex structural phases.
- Rapid quenching can induce novel structural modifications in alloys.
Purpose of the Study:
- To characterize a newly observed modulated structure in Mn2RuSn.
- To elucidate the crystallographic nature of this modulated phase.
Main Methods:
- Powder X-ray diffraction (XRD) for structural indexing.
- Electron diffraction and transmission electron microscopy (TEM) for detailed structural analysis.
- Crystallographic analysis of high-resolution TEM images.
Main Results:
- A modulated structure derived from the inverse Heusler phase (XA-type and L21B-type) was identified in Mn2RuSn ribbons.
- XRD patterns indexed to an L21B-type structure.
- Electron diffraction revealed additional reflections indicating long periodicity and orthogonal domains.
Conclusions:
- A novel modulated structure exists in rapidly quenched Mn2RuSn.
- The structure exhibits characteristics of XA-type and L21B-type phases with long-range order.
- A structural model was proposed to explain the experimental observations.
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