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Controllable thermal expansion and magnetic structure in Er2(Fe,Co)14B intermetallic compounds

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Abstract

The control of thermal expansion is attractive but remains challenging for the studies of negative thermal expansion materials. Here, we report a continuously controllable thermal expansion from negative to positive by means of adjusting the magnetic moment of Fe in Er2(Fe,Co)14B intermetallic compounds. Interestingly, a zero thermal expansion (ZTE) has been achieved in a wide temperature range (ΔT = 355 K), which is larger than most existing ZTE alloys. The spontaneous magnetostriction (ωS) reveals a negative contribution arising from the magneto-volume effect to the controllable thermal expansion. The present study could be suitable for the design of controllable thermal expansion of other alloys related to the magneto-volume effect.

Graphical abstract: Controllable thermal expansion and magnetic structure in Er2(Fe,Co)14B intermetallic compounds

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Publication details

The article was received on 04 Jul 2019, accepted on 17 Sep 2019 and first published on 19 Sep 2019


Article type: Research Article
DOI: 10.1039/C9QI00819E
Inorg. Chem. Front., 2019, Advance Article

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    Controllable thermal expansion and magnetic structure in Er2(Fe,Co)14B intermetallic compounds

    Y. Qiao, Y. Song, M. Xu, Q. Gao, Y. Ren, X. Xing and J. Chen, Inorg. Chem. Front., 2019, Advance Article , DOI: 10.1039/C9QI00819E

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