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Title: Controllable thermal expansion and magnetic structure in Er 2 (Fe,Co) 14 B intermetallic compounds

Journal Article · · Inorganic Chemistry Frontiers (Online)
DOI: https://doi.org/10.1039/C9QI00819E · OSTI ID:1630421
 [1];  [1];  [1];  [2];  [3];  [1]; ORCiD logo [1]
  1. Univ. of Science and Technology Beijing (China). Beijing Advanced Innovation Center for Materials Genome Engineering, and Dept. of Physical Chemistry
  2. Zhengzhou Univ. (China). School of Physics and Engineering
  3. Argonne National Lab. (ANL), Argonne, IL (United States)

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.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division; National Natural Science Foundation of China (NSFC); Fundamental Research Funds for the Central Universities; China Postdoctoral Science Foundation
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1630421
Journal Information:
Inorganic Chemistry Frontiers (Online), Vol. 6, Issue 11; ISSN 2052-1553
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English

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