Exchange interactions in the genuine organic ferromagnet accompanying pressure-induced ferro- to antiferromagnetic transition

The continuous variation of magnetic intermolecular interactions has been studied in the pressurized genuine organic ferromagnet, β-phase para-nitrophenyl nitronyl nitroxide ( T c = 0.61 K), in which a pressure-induced ferro- to antiferromagnetic transition was observed under pressure around 6.5 kba...

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Bibliographic Details
Published in:Chemical physics letters 1999-07, Vol.308 (3), p.181-186
Main Authors: Takeda, Kazuyoshi, Mito, Masaki, Kawae, Tatsuya, Deguchi, Hiroyuki, Takagi, Seishi, Okumura, Mitsutaka, Kawakami, Takashi, Yamaguchi, Kizashi, Kinoshita, Minoru
Format: Article
Language:English
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Summary:The continuous variation of magnetic intermolecular interactions has been studied in the pressurized genuine organic ferromagnet, β-phase para-nitrophenyl nitronyl nitroxide ( T c = 0.61 K), in which a pressure-induced ferro- to antiferromagnetic transition was observed under pressure around 6.5 kbar at 0.45 K. The rotation of the radical group C 6H 4NO 2 around its symmetrical axis in crystallized molecules is pointed out to be essential to change magnitude and a sign of the dominant exchange interactions, rather than the shrinkage of the lattice parameters under pressure.
ISSN:0009-2614
1873-4448
DOI:10.1016/S0009-2614(99)00571-0