β’-(BEDT-TTF)(TCNQ) is a compound of BEDT-TTF (=ET) and TCNQ molecules aligned orthogonally with each other, forming two-dimensional sheets and one-dimensional columns of 1/4-filled π band, respectively. It is known that the metal-insulator transition occurs at 330 K at ambient pressure. We have measured the electronic spin susceptibility by means of the EPR-NMR method at 50 MHz, and the angular dependence of g-factor and line width of EPR both at Q (34 GHz) and W (94 GHz) band. We successfully confirmed that the antiferromagnetic transition occurs in ET sheets and TCNQ columns, independently.
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Konno, S., Kazama, S., Hiraoka, M. et al. EPR Study of the Electronic States of β’-(BEDT-TTF)(TCNQ). J Low Temp Phys 142, 629–632 (2006). https://doi.org/10.1007/s10909-006-9198-4
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DOI: https://doi.org/10.1007/s10909-006-9198-4