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Local structure study on magnetostrictive material Tb1–xDyxFe2

Journal Article · · Journal of Applied Physics
DOI:https://doi.org/10.1063/5.0009939· OSTI ID:1773015
 [1];  [2];  [2];  [2];  [2];  [2];  [3];  [4];  [2]
  1. Xi’an Jiaotong Univ. (China); Univ. of Chicago, Lemont, IL (United States)
  2. Xi’an Jiaotong Univ. (China)
  3. Univ. of Chicago, Lemont, IL (United States)
  4. Argonne National Lab. (ANL), Lemont, IL (United States). Advanced Photon Source (APS)
+ Show Author Affiliations
Tb1–xDyxFe2 system has attracted more research interest due to the large magnetostrictive effect. The crystal structures and physical properties have been well studied, but research studies on their local structures are still rare. As such, in this work, the local structure of Tb1–xDyxFe2 samples was studied using the pair distribution function and x-ray absorption spectroscopy techniques. The results demonstrate that the system owns the same local crystal symmetry with its average structure in the ferromagnetic phase, and the crystal lattice of the system is more ordered with increasing Dy content, indicating that the Dy-rich tetragonal phase is more stable than the Tb-rich rhombohedral phase. The different roles of metallic bonds in affecting the crystal lattice are presented. The weak Fe1–Fe2 bonds influenced by the local environment such as local stress from randomly distributed nanodomains could originate the anomalies in the lattice, resulting in the more ordered and stable Dy-rich phase than the Tb-rich phase.
Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
National Natural Science Foundation of China (NSFC); Fundamental Research Funds for the Central Universities; USDOE Office of Science (SC); National Science Foundation (NSF)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1773015
Journal Information:
Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 23 Vol. 127; ISSN 0021-8979
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

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Related Subjects

36 MATERIALS SCIENCE
local structure
magnetostriction
morphotropic phase boundary
structure transition