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Universal Fluctuating Regime in Triangular Chromate Antiferromagnets by Somesh, K.; Furukawa, Y.; Simutis, G.; Bert, F.; Prinz-Zwick, M.; Büttgen, N.; Zorko, A.; Tsirlin, A. A.; Mendels, P.; Nath, and R. is a scholarly article available to read on EtoBox.

What is Universal Fluctuating Regime in Triangular Chromate Antiferromagnets about?

We report x-ray diffraction, magnetic susceptibility, heat capacity, $^{1}$H nuclear magnetic resonance (NMR), and muon spin relaxation ($\mu$SR) measurements, as well as density-functional band-structure calculations for the frustrated $S=3/2$ triangular lattice Heisenberg antiferromagnet (TLHAF) $\alpha$-HCrO$_{2}$ (trigonal, space group: $R\bar{3}m$). This compound undergoes a clear magnetic transition at $T_{\rm N} \simeq 22.5$~K, as seen from the drop in the muon paramagnetic fraction and concurrent anomalies in the magnetic susceptibility and specific heat. Local probes (NMR and $\mu$SR) reveal a broad regime with slow fluctuations down to $0.7\,T_{\rm N}$, this temperature corresponding to the maximum in the $\mu$SR relaxation rate and in the NMR wipe-out. From the comparison with NaCrO$_{2}$ and $\alpha$-KCrO$_{2}$, the fluctuating regime and slow dynamics below $T_{\rm N}$ appear to be hallmarks of the TLHAF with $ABC$ stacking that leads to a frustration of interlayer couplings between the triangular planes. This interlayer frustration is a powerful lever to generate spin states with persistent dynamics and may bear implications to spin-liquid candidates with the triangul

Author

Somesh, K.; Furukawa, Y.; Simutis, G.; Bert, F.; Prinz-Zwick, M.; Büttgen, N.; Zorko, A.; Tsirlin, A. A.; Mendels, P.; Nath, and R.

Published

2021

Language

EN