Alternating Ferro- and Antiferromagnetic Couplings in One-Dimensional Chain Hexachlorodicuprate(II), (MV)[CuCl3]2 (MV = Methyl Viologen)

Author(s): Yasushi Seki, Atsushi Okazawa, Masaya Enomoto, Jun Harada, Keiichiro Ogawa, Norimichi Kojima.

Journal Name: Current Inorganic Chemistry (Discontinued)

Volume 3 , Issue 2 , 2013


To study quantum spin systems, we have investigated the magnetic properties of a one-dimensional chain magnet, (MV)[CuCl3]2 (MV = 1,1’-dimethyl-4,4’-bipyridinium). The chain structure of [Cu2C16]∞ is represented as an alternating inplane/ out-of-plane bridging system. From the analysis of magnetic susceptibility, we revealed the alternating ferro- /antiferromagnetic couplings in the chain, and estimated the two exchange coupling parameters between copper ions as J1/kB = –18.08(3) K and J2/kB = +1.33(17) K (defined as H = –2  Σ(Ji Si-1 ·Si + J2 Si .Si+1)). Additionally, the DFT calculations were performed, giving the exchange coupling constants as –16.78 K and +1.86 K. The calculated values are in good agreement with the experimental results. EPR spectra below 7 K revealed the triplet spin state in the copper(II) chain, indicating clearly the intrinsic ferromagnetic coupling, while the antiferromagnetic is dominant. It is concluded that (MV)[CuCl3]2 shows the quantum fluctuated one-dimensional spin system having alternating ferro- and antiferromagnetic couplings.

Keywords: Alternating chain, copper, exchange coupling, magnetic property, quantum spin system.

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Article Details

Year: 2013
Page: [94 - 100]
Pages: 7
DOI: 10.2174/1877944111303020004
Price: $58

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