Role of „dumbbell“ pairs of Fe in spin alignments and negative thermal expansion of Lu.sub.2./sub.Fe.sub.17./sub.-based intermetallic compounds

0539033 - FZÚ 2021 RIV US eng J - Journal Article
Cao, Y. - Lin, K. - Liu, Z. - Hu, J. - Wang, C.W. - Tereshina-Chitrova, Evgenia - Kato, K. - Li, Q. - Deng, J. - Chen, J. - Zhang, H. - Xing, X.R.
Role of „dumbbell“ pairs of Fe in spin alignments and negative thermal expansion of Lu₂Fe₁₇-based intermetallic compounds.
Inorganic Chemistry. Roč. 59, č. 16 (2020), s. 11228-11232. ISSN 0020-1669. E-ISSN 1520-510X
R&D Projects: GA ČR(CZ) GA19-00925S
Institutional support: RVO:68378271
Keywords : rare-earth intermetallics * stoichiometry * magnetic properties * synchrotron radiation * neutron diffraction
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 5.165, year: 2020
Method of publishing: Limited access
https://doi.org/10.1021/acs.inorgchem.0c01590

Knowledge of negative thermal expansion (NTE) is an interesting issue in the field of materials science and engineering. It has been proposed that the unique dumbbell pairs of Fe (dumbbells) are highly entangled in the NTE behaviors of R2Fe17 (R = rare earth) compounds but still remain controversial. Here, a facile method is employed to explore the role of dumbbells in spin alignments and NTE by the nonstoichiometric design of Lu2-xFe17 compounds. The powder synchrotron X-ray diffraction, magnetometry, and neutron powder diffraction investigations indicate that a decrease of the Lu content can enhance the dumbbell concentration and motivate an incommensurate magnetic structure simultaneously.This work gives insight into the role that dumbbells played in spin alignments and NTE for Lu2Fe17-based compounds.
Permanent Link: http://hdl.handle.net/11104/0316788