Abstract
The magnetic properties of new radical cation salts (BEDT-TTF)2[CuMn(dca)4] (I) and (BEDT-TTF)2[Mn(dca)3] (II) [where BEDT-TTF = bis(ethylenedithio)tetrathiafulvalene and dca = N(CN2)] are investigated using superconducting quantum interference device (SQUID) magnetometry and electron paramagnetic resonance (EPR) spectroscopy. It is established that, at temperatures below 25 K, both salts are characterized by antiferromagnetic deviations from the paramagnetic behavior. The Weiss constants for compounds I and II are determined to be −5 and −10 K, respectively. The corresponding correlations in the structure of compound I are short-range correlations and do not lead to a change in the effective spin equal to 5/2. It is found that the widths of the EPR lines attributed to the BEDT-TTF conducting sublattice correlate with the widths of the EPR lines associated with the magnetic sublattice of the Mn(dca) −3 counterion in the structure of salt II. This correlation suggests that the antiferromagnetic ordering in the magnetic sublattice of compound II affects the spin-lattice relaxation in the BEDT-TTF sublattice. The dependence of the magnetic moment on the magnetic field for compound II at a temperature of 2 K is typical of weakly frustrated uniaxial antiferromagnets and exhibits a kink in a magnetic field of 20 kOe, which corresponds to spin-flop transitions.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
M. Verdaguer, A. Bleuzen, V. Marvaud, J. Vaiseerman, A. Scuiller, C. Train, R. Garde, G. Gelly, C. Lomenech, I. Rosenman, P. Veillet, C. Cartier, and F. Villain, Coord. Chem. Rev. 190–192, 1023 (1999).
T. Mallah, S. Thiebaut, M. Verdaguer, and P. Veillet, Science (Washington) 262, 1554 (1993).
S. Ferlay, T. Mallah, R. Ouahes, P. Veillet, and M. Verdaguer, Nature (London) 378, 701 (1995).
T. Mallah, C. Auberger, M. Verdaguer, and P. Veillet, J. Chem. Soc., Chem. Commun., No. 1, 61 (1995).
A. Scuiller, T. Mallah, A. Nivorozhkin, M. Verdaguer, and P. Veillet, New J. Chem. 20, 1 (1996).
K. Inoue, K. Kikuchi, M. Ohba, and H. Ōkawa, Angew. Chem., Int. Ed. 42(39), 4810 (2003).
H. Miyasaka, K. Nakata, L. Lecren, C. Coulon, Y. Nakazawa, T. Fujisaki, K. Sugiura, M. Yamashita, and R. Clérac, J. Am. Chem. Soc. 128, 3770 (2006).
J. S. Miller and M. Drillon, Magnetism: Molecules to Materials (Wiley, Weinheim, 2005), Vol. V.
J. T. Culp, J. H. Park, F. Frye, Y. Huh, M. W. Meisel, and D. R. Talham, Coord. Chem. Rev. 249, 2642 (2005).
H. Miyasaka, Y. Yoshino, T. Ishii, R. Kanehama, T. Manabe, M. Yamashita, H. Nishikawa, I. Ikemoto, H. Kishida, H. Matsuzaki, and H. Okamoto, J. Solid State Chem. 168, 418 (2002).
J. A. Schlueter, U. Geiser, and J. L. Manson, J. Phys. IV 114, 475 (2004).
R. Feyerhem, A. Loose, and J. L. Manson, J. Phys. Condens. Matter 15, 663 (2003).
H. Watanabe and M. Ogata, J. Phys. Soc. Jpn. 75, 063 702 (2006).
N. D. Kushch, A. V. Kazakova, E. B. Yagubskii, A. D. Dubrovskii, G. V. Shilov, L. I. Buravov, R. B. Morgunov, and Y. Tanimoto, submitted to J. Chem. Mater.
C. G. Sorin, PhD Thesis (Department of Physics, Osnabrück University, Osnabrück, Germany 2003), p. 33.
C. R. Kmety, Q. Huang, J. W. Lynn, R. W. Erwin, J. L. Manson, S. McCall, J. E. Crow, K. L. Stevenson, J. S. Miller, and A. J. Epstein, Phys. Rev. B: Condens. Matter 62, 5576 (2000).
P. Jensen, D. J. Price, S. R. Batten, B. Moubaraki, and K. S. Murray, Chem.—Eur. J. 6, 3186 (2000).
L. J. de Jongh and A. Rmiedema, Adv. Phys. 23, 1 (1974).
T. Oguchi, Phys. Rev. 117, 117 (1960).
G. C. DeFotis, E. D. Remy, and C. W. Scherrer, Phys. Rev. B: Condens. Matter 41, 9047 (1990).
G. C. DeFotis, C. K. Barowe, and W. R. Shangraw, J. Magn. Magn. Mater. 54–57, 1493 (1986).
S. S. Sosin, L. A. Prozorova, and A. I. Smirnov, Usp. Fiz. Nauk 175(1), 92 (2005) [Phys. Usp. 48 (1), 83 (2005)].
L. E. Svistov, A. I. Smirnov, L. A. Prozorova, and O. A. Petrenko, Phys. Rev. B: Condens. Matter 67, 094434-1 (2003).
B. Canals and C. Lacroix, Phys. Rev. B: Condens. Matter 61, 1149 (2000).
Author information
Authors and Affiliations
Additional information
Original Russian Text © R.B. Morgunov, E.V. Kurganova, Y. Tanimoto, A.S. Markosyan, A.V. Kazakova, N.D. Kushch, É.B. Yagubskiĭ, A.D. Dubrovskiĭ, G.V. Shilov, 2007, published in Fizika Tverdogo Tela, 2007, Vol. 49, No. 5, pp. 859–864.
Rights and permissions
About this article
Cite this article
Morgunov, R.B., Kurganova, E.V., Tanimoto, Y. et al. Spin-frustrated antiferromagnets based on BEDT-TTF and manganese dicyanamide complexes. Phys. Solid State 49, 905–911 (2007). https://doi.org/10.1134/S1063783407050174
Received:
Issue Date:
DOI: https://doi.org/10.1134/S1063783407050174