Coexistence of ferromagnetic and antiferromagnetic interactions and magnetic ordering in the alternating stacking structure of (BDTA)[Ni(mnt)(2)]: Possible supramolecular superexchange mechanism

Umezono Y; Fujita W; Awaga K

Chemical Physics Letters, Vol.409, No.1-3, 139-143, 2005

DOI10.1016/j.cplett.2005.04.074 Export Citation

Coexistence of ferromagnetic and antiferromagnetic interactions and magnetic ordering in the alternating stacking structure of (BDTA)[Ni(mnt)(2)]: Possible supramolecular superexchange mechanism

Umezono Y, Fujita W, Awaga K

The crystal structure of a charge transfer salt, (BDTA)[Ni(mnt)(2)], where BDTA is 1,3,2-benzodithiazolyl and mnt is maleonitriledithiolate, was found to consist of alternating stacking columns of S = 0 BDTA(+) and S = 1/2 [Ni(mnt)(2)](-). Magnetic and thermodynamic measurements revealed the coexistence of ferromagnetic and antiferromagnetic interactions and antiferromagnetic ordering at 3.4 K. The observed ferromagnetic coupling was interpreted in terms of a supramolecular superexchange mechanism. (c) 2005 Elsevier B.V. All rights reserved.