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arXiv · 1302.0343

Effects of pressure on the ferromagnetic state of the CDW compound SmNiC2

B. Woo·S. Seo·E. Park·J. H. Kim·D. Jang·T. Park·H. Lee·F. Ronning·J. D. Thompson·V. A. Sidorov·Y. S. Kwon
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Abstract

We report the pressure response of charge-density-wave (CDW) and ferromagnetic (FM) phases of the rare-earth intermetallic SmNiC2 up to 5.5 GPa. The CDW transition temperature (T_{CDW}), which is reflected as a sharp inflection in the electrical resistivity, is almost independent of pressure up to 2.18 GPa but is strongly enhanced at higher pressures, increasing from 155.7 K at 2.2 GPa to 279.3 K at 5.5 GPa. Commensurate with the sharp increase in T_{CDW}, the first-order FM phase transition, which decreases with applied pressure, bifurcates into the upper (T_{M1}) and lower (T_c) phase transitions and the lower transition changes its nature to second order above 2.18 GPa. Enhancement both in the residual resistivity and the Fermi-liquid T^2 coefficient A near 3.8 GPa suggests abundant magnetic quantum fluctuations that arise from the possible presence of a FM quantum critical point.

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B. Woo, S. Seo, E. Park, J. H. Kim, D. Jang, T. Park, H. Lee, F. Ronning, J. D. Thompson, V. A. Sidorov, Y. S. Kwon. 2013-02-02. Effects of pressure on the ferromagnetic state of the CDW compound SmNiC2. https://doi.org/10.1103/physrevb.87.125121

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