Thermal stability and phase evolution of topological nodal-line semimetal PtSn₄ using synchrotron X-ray powder diffraction

IF 5.3 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Scripta Materialia Pub Date : 2025-03-03 DOI:10.1016/j.scriptamat.2025.116627

Satheasuweatha M. N , Lara Gigli , Nicola Demitri , C.S. Lue , C.N. Kuo , Sonachalam Arumugam , Boby Joseph

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Abstract

A systematic temperature-dependent synchrotron x-ray diffraction (XRD) of the topological nodal-line semimetallic PtSn₄ in the range of 300 to 873 K is presented. Single-crystal XRD revealed that the PtSn₄ structure belongs to space-group Ccca (n. 68) with lattice parameters a = 6.399, b = 11.306 and c = 6.363 Å at 100 K. This structure is found to be stable up to 613 K. At 673 K, Bragg peaks corresponding to the cubic PtSn₂ phase with weight fraction ∼7% is observed. However, the nascent PtSn₂ and the original PtSn₄ phases seem to co-exist with only a minimal increment in the PtSn₂ phase fraction with temperature till 793 K. Such a contrasting temperature dependence may be due to the peculiar topological properties of the title system. At 833 K, PtSn₄ is found to be no more stable, decomposing to an equal mixture of PtSn₂ and SnO₂.

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来源期刊

Scripta Materialia 工程技术-材料科学：综合

CiteScore

11.40

自引率

5.00%

发文量

581

审稿时长

34 days

期刊介绍： Scripta Materialia is a LETTERS journal of Acta Materialia, providing a forum for the rapid publication of short communications on the relationship between the structure and the properties of inorganic materials. The emphasis is on originality rather than incremental research. Short reports on the development of materials with novel or substantially improved properties are also welcomed. Emphasis is on either the functional or mechanical behavior of metals, ceramics and semiconductors at all length scales.