Magnetic Structure and Abnormal Thermal Expansion of Trigonal Cr<sub>5</sub>Te<sub>8</sub>

doi:10.11900/0412.1961.2024.00008

IMR OpenIR

	Magnetic Structure and Abnormal Thermal Expansion of Trigonal Cr₅Te₈
	Ren Weijun 1,2; An Meng 1,2; Gao Fei 1,2; Luo Xiaohua 1; Li Bing 1,2; Zhang Zhidong 1,2; Wang Chin-Wei 3
通讯作者	Ren Weijun(wjren@imr.ac.cn)
	2024-08-11
发表期刊	ACTA METALLURGICA SINICA
ISSN	0412-1961
卷号	60 期号:8 页码:1150-1154
摘要	Many binary Cr-Te compounds can be regarded as formed due to varying degrees of ordered vacancies of metal Cr atoms in Cr-Te with the NiAs structure. Among them, Cr5Te8 shows two structures: trigonal and monoclinic. This study determined that Cr5Te8 grown using the self-flux method shows a trigonal P (3) over bar m1 crystal structure with lattice constants a = 0.3900 nm and c = 0.5986 nm, as elucidated through the Rietveld refinement of powder X-ray and neutron diffraction patterns. Neutron powder diffraction experiments reveal its collinear ferromagnetic compound, with Cr magnetic moments oriented along the c axis. In addition, it exhibits low negative thermal expansion along the a direction and normal thermal expansion along the c direction. Within the temperature range of 3.3-300 K, using the lowest temperature of 3.3 K as a reference, the average thermal expansion coefficient of Cr5Te8 is - 10.7 x 10(-6) and 52.4 x 10(-6) K-1 in the a and c directions, respectively. Cr5Te8 crystals oriented along the [101], [302], and [201] directions show near-zero thermal expansion and thus have wide application prospects. The abnormal thermal expansion of Cr5Te8 is apparently unrelated to its magnetic order but may be related to the Cr vacancies in the crystal lattice.
关键词	neutron powder diffraction negative thermal expansion magnetic structure
DOI	10.11900/0412.1961.2024.00008
收录类别	SCI
语种	英语
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001281277300014
出版者	SCIENCE PRESS
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/189591
专题	中国科学院金属研究所
通讯作者	Ren Weijun
作者单位	1.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.Australian Nucl Sci & Technol Org, New Illawarra Rd, Lucas Heights, NSW 2234, Australia
推荐引用方式 GB/T 7714	Ren Weijun,An Meng,Gao Fei,et al. Magnetic Structure and Abnormal Thermal Expansion of Trigonal Cr₅Te₈[J]. ACTA METALLURGICA SINICA,2024,60(8):1150-1154.
APA	Ren Weijun.,An Meng.,Gao Fei.,Luo Xiaohua.,Li Bing.,...&Wang Chin-Wei.(2024).Magnetic Structure and Abnormal Thermal Expansion of Trigonal Cr₅Te₈.ACTA METALLURGICA SINICA,60(8),1150-1154.
MLA	Ren Weijun,et al."Magnetic Structure and Abnormal Thermal Expansion of Trigonal Cr₅Te₈".ACTA METALLURGICA SINICA 60.8(2024):1150-1154.