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Magnetism in polymeric rhombohedral C60 phases was studied by ab initio calculations. Compression of C60 leads to the formation of C60–C60 bonds in the S0 state, and with increasing pressure the S0 and T2 curves meet (see picture), and some of the bonds can cross to the magnetically active T2 state. When the pressure is released these follow the T2 curve and remain magnetically active at ambient pressure. r=interfullerene distance.
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Ribas‐Ariño et al. (2004) studied this question.
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