O. M. Vyaselev, M. V. Kartsovnik, N. D. Kushch, È. B. Yagubskii, “Staggered Spin Order of Localized $\pi$-electrons in the Insulating State of the Organic Conductor $\kappa$-(BETS)$_2$Mn[N(CN)$_2$]$_3$”, Pis'ma v Zh. Èksper. Teoret. Fiz., 2012, Volume 95, Issue 11,Pages 643

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CONDENSED MATTER

Staggered Spin Order of Localized $\pi$-electrons in the Insulating State of the Organic Conductor $\kappa$-(BETS)$_2$Mn[N(CN)$_2$]$_3$

O. M. Vyaselev^a, M. V. Kartsovnik^b, N. D. Kushch^c, È. B. Yagubskii^c

^a Institute of Solid State Physics, Russian Academy of Sciences
^b Walther-Meissner-Institut, Bayerische Akademie der Wissenschaften
^c Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, Moscow region

Abstract: Magnetic properties of the conduction $\pi$-electron system of $\kappa$-(BETS)$_2$Mn[N(CN)$_2$]$_3$ have been probed using $^{13}$C NMR. At ambient pressure, the metal-insulator transition observed in the resistivity measurements below $T\simeq23\,$K is shown to be accompanied by ordering of the $\pi$-spins in a long-range staggered structure. As the metal-insulator transition is suppressed by applying a small pressure of $\sim 0.5\,$kbar, the $\pi$-spin system maintains the properties of the metallic state down to $5$ K.

Received: 18.04.2012

Language: English