The roles of donor layers and acceptor stacks in the electronic properties of the charge transfer complex, (BETS)2(Br2TCNQ) were investigated by means of site-selective NMR measurements. Line broadening of 77Se NMR indicating a magnetic ordering on the BETS site was observed at the metal-insulator transition temperature 12 K. This transition is caused by the spin-density-wave formation on the BETS layers. 13C NMR on the cyano carbon in the Br2TCNQ molecule confirms that a spin singlet formation starts to develop on the one dimensional Br2TCNQ columns below 170 K and its three dimensional ordering appears below 80 K. From the analysis of the NMR line shape and shift, magnetic susceptibility was decomposed into the contributions of the BETS and Br2TCNQ sites.
|Number of pages||6|
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|Publication status||Published - Jul 15 2002|
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics