Biesner, Tobias, Seulki Roh, Andrej Pustogow, Hong Zheng, J. F. Mitchell, and Martin Dressel. "Magnetic terahertz resonances above the Néel temperature in the frustrated kagome antiferromagnet averievite." Physical Review B 105, no. 6 (2022): L060410.
for full paper see https://journals.aps.org/prb/abstract/10.1103/PhysRevB.105.L060410
Abstract
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. Our results illustrate the effect of magnetic interactions in THz
spectra of frustrated magnets.
… All specimens were measured with a time-domain THz
spectrometer (TeraView TeraPulse 4000) attaching a homemade He-bath cryostat and a superconducting magnet (Oxford Instruments). The magneto-THz experiments were performed
in …
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