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Title: Small influence of magnetic ordering on lattice dynamics in TaFe 1.25 Te 3

Journal Article · · Physical Review B
 [1];  [1];  [1];  [1];  [1];  [2];  [3];  [1]
  1. Univ. of Belgrade (Serbia)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States); Tianjin Univ. of Technology (China)
  3. Brookhaven National Lab. (BNL), Upton, NY (United States)

Raman scattering spectra of zigzag spin chain TaFe1.25Te3 single crystal are presented in a temperature range from 80 to 300 K. Nine Raman active modes of Ag and Bg symmetry are clearly observed and assigned by probing different scattering channels, which is confirmed by lattice dynamics calculations. Temperature dependence of the Raman modes linewidth is mainly governed by the lattice anharmonicity. The only deviation from the conventional behavior is observed for Ag symmetry modes in a vicinity of the magnetic phase transition at T N ≈ 200 K. This implies that the electron-phonon interaction weakly changes with temperature and magnetic ordering, whereas small changes in the spectra near the critical temperature can be ascribed to spin fluctuations.

Research Organization:
Brookhaven National Lab. (BNL), Upton, NY (United States); Energy Frontier Research Centers (EFRC) (United States). Center for Emergent Superconductivity (CES)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0012704
OSTI ID:
1425061
Alternate ID(s):
OSTI ID: 1409139
Report Number(s):
BNL-200078-2018-JAAM; PRBMDO; TRN: US1802023
Journal Information:
Physical Review B, Vol. 96, Issue 17; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 1 work
Citation information provided by
Web of Science

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Temperature-Dependent Raman Study of Nanostructured and Multifunctional Materials journal March 2019

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