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

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

doi:10.1021/acs.inorgchem.8b03600

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

Yongqiang Qiao, Yuzhu Song, Kun Lin, Xinzhi Liu, Alexandra Franz, Yang Ren, Jinxia Deng, Rongjin Huang, Laifeng Li, Jun Chen^*, Xianran Xing

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

19 Citations (Scopus)

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. ©

Original language	English
Pages (from-to)	5380-5383
Journal	Inorganic Chemistry
Volume	58
Issue number	9
DOIs	https://doi.org/10.1021/acs.inorgchem.8b03600
Publication status	Published - 6 May 2019
Externally published	Yes

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

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. {\textcopyright}",

author = "Yongqiang Qiao and Yuzhu Song and Kun Lin and Xinzhi Liu and Alexandra Franz and Yang Ren and Jinxia Deng and Rongjin Huang and Laifeng Li and Jun Chen and Xianran Xing",

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TY - JOUR

T1 - Negative Thermal Expansion in (Hf,Ti)Fe 2 Induced by the Ferromagnetic and Antiferromagnetic Phase Coexistence

AU - Qiao, Yongqiang

AU - Song, Yuzhu

AU - Lin, Kun

AU - Liu, Xinzhi

AU - Franz, Alexandra

AU - Ren, Yang

AU - Deng, Jinxia

AU - Huang, Rongjin

AU - Li, Laifeng

AU - Chen, Jun

AU - Xing, Xianran

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

PY - 2019/5/6

Y1 - 2019/5/6

N2 - 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. ©

AB - 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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DO - 10.1021/acs.inorgchem.8b03600

M3 - RGC 21 - Publication in refereed journal

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SN - 0020-1669

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EP - 5383

JO - Inorganic Chemistry

JF - Inorganic Chemistry

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