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arXiv · 1711.03562

Magnetization, specific heat, and thermal conductivity of hexagonal ErMnO$_3$ single crystals

J. D. Song. C. Fan·Z. Y. Zhao·F. B. Zhang·J. Y. Zhao·X. G. Liu·X. Zhao·Y. J. Liu·J. F. Wang·X. F. Sun
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Abstract

We report a study of magnetism and magnetic transitions of hexagonal ErMnO$_3$ single crystals by magnetization, specific heat and heat transport measurements. Magnetization data show that the $c$-axis magnetic field induces three magnetic transitions at 0.8, 12 and 28 T. The specific heat shows a peak at 2.2 K, which is due to a magnetic transition of Er$^{3+}$ moments. For low-$T$ thermal conductivity ($κ$), a clear dip-like feature appears in $κ(H)$ isotherm at 1--1.25 T for $H \parallel ab$; while in the case of $H \parallel c$, a step-like increase is observed at 0.5--0.8 T. The transition fields in $κ(H)$ are in good agreement with those obtained from magnetization, and the anomaly of $κ$ can be understood by a spin-phonon scattering scenario. The natures of magnetic structures and corresponding field-induced transitions at low temperatures are discussed.

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J. D. Song. C. Fan, Z. Y. Zhao, F. B. Zhang, J. Y. Zhao, X. G. Liu, X. Zhao, Y. J. Liu, J. F. Wang, X. F. Sun. 2017-11-09. Magnetization, specific heat, and thermal conductivity of hexagonal ErMnO$_3$ single crystals. https://doi.org/10.1103/physrevb.96.174425

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