Negative Thermal Expansion in (Hf,Ti)Fe 2 Induced by the Ferromagnetic and Antiferromagnetic Phase Coexistence

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Yongqiang Qiao
  • Yuzhu Song
  • Kun Lin
  • Xinzhi Liu
  • Alexandra Franz
  • Jinxia Deng
  • Rongjin Huang
  • Laifeng Li
  • Jun Chen
  • Xianran Xing

Detail(s)

Original languageEnglish
Pages (from-to)5380-5383
Journal / PublicationInorganic Chemistry
Volume58
Issue number9
Publication statusPublished - 6 May 2019
Externally publishedYes

Abstract

Negative thermal expansion (NTE) is an intriguing physical phenomenon that can be used in the applications of thermal expansion adjustment of materials. In this study, we report a NTE compound of (Hf,Ti)Fe 2 , while both end members of HfFe 2 and TiFe 2 show positive thermal expansion. The results reveal that phase coexistence is detected in the whole NTE zone, in which one phase is ferromagnetic (FM), while the other is antiferromagnetic (AFM). With increasing temperature, the FM phase is gradually transformed to the AFM one. The NTE phenomenon occurs in the present (Hf,Ti)Fe 2 because of the fact that the unit cell volume of the AFM phase is smaller than that of the FM phase, and the mass fraction of the AFM phase increases with increasing temperature. The construction of phase coexistence can be a method to achieve NTE materials in future studies. ©

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Citation Format(s)

Negative Thermal Expansion in (Hf,Ti)Fe 2 Induced by the Ferromagnetic and Antiferromagnetic Phase Coexistence. / Qiao, Yongqiang; Song, Yuzhu; Lin, Kun et al.
In: Inorganic Chemistry, Vol. 58, No. 9, 06.05.2019, p. 5380-5383.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review