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Magnetic terahertz resonances above the Néel temperature in the frustrated kagome antiferromagnet averievite

Journal Article · · Physical Review. B
Time-domain magneto-THz spectroscopy is utilized to study the frustrated magnet averievite Cu5–xZnxV2O10(CsCl). Pronounced THz resonances are observed in unsubstituted samples (x = 0) when cooling below the onset of short-range magnetic correlations. The influence of external magnetic effects confirms the magnetic origin of these resonances. Increasing Zn substitution suppresses the resonances, as frustration effects dominate, reflecting the nonmagnetic phases for x > 0.25 compounds. The temperature evolution of the THz spectra is complemented with electron spin resonance spectroscopy. This comparison allows a direct probe of the different contributions from magnetic order, frustration, and structural properties in the phase diagram of averievite. Furthermore, our results illustrate the effect of magnetic interactions in THz spectra of frustrated magnets.
Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
Deutsche Forschungsgemeinschaft (DFG); USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1868999
Journal Information:
Physical Review. B, Journal Name: Physical Review. B Journal Issue: 6 Vol. 105; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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