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arXiv · 1612.06188

New radical cation salt $κ$-(BETS)$_2$Co$_{0.13}$Mn$_{0.87}$[N(CN)$_2$]$_3$ with two magnetic metals: synthesis, structure, conductivity and magnetic peculiarities

N. D. Kushch·O. M. Vyaselev·V. N. Zverev·W. Biberacher·L. I. Buravov·E. B. Yagubskii·E. Herdtweck·E. Canadell·M. V. Kartsovnik
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Abstract

A new metallic radical cation salt $κ$-(BETS)$_2$Co$_{0.13}$Mn$_{0.87}$[N(CN)$_2$]$_3$, where BETS is bis(ethylenedithio)tetraselenafulvalene, C$_{10}$S$_4$Se$_4$H$_8$, has been synthesized. In this salt, a part of Mn$^{2+}$ ions are replaced by Co$^{2+}$ which acts as a magnetic dopant with a different effective magnetic moment. Crystal structure, band structure, conducting and magnetic properties of the salt have been studied. Below 30 K the material undergoes a metal-insulator transition, which is suppressed by applying a pressure of ~0.5kbar, leading to a superconducting ground state. While the structural and conducting properties are very similar to those of the parent salt $κ$-(BETS)$_2$Mn[N(CN)$_2$]$_3$, magnetic properties associated with localized moments in the anion layer are found to be surprisingly different.

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N. D. Kushch, O. M. Vyaselev, V. N. Zverev, W. Biberacher, L. I. Buravov, E. B. Yagubskii, E. Herdtweck, E. Canadell, M. V. Kartsovnik. 2017-02-07. New radical cation salt $κ$-(BETS)$_2$Co$_{0.13}$Mn$_{0.87}$[N(CN)$_2$]$_3$ with two magnetic metals: synthesis, structure, conductivity and magnetic peculiarities. https://arxiv.org/abs/1612.06188

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