Pressure dependence of the magnetization of MII(N(CN)2)2: mechanism for the long range magnetic ordering

Christopher J. Nuttall, Taishi Takenobu, Yoshihiro Iwasa, Mohamedally Kurmoo

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Abstract

The ac-susceptibilities of the isostructural metal-organic magnets, MII(N(CN)2)2(M = Ni (1), Co (2) and Fe (3)) have been studied as a function of temperature and pressure. Large variation in behaviors has been observed; the transition temperature initially increases in all three compounds and at higher pressures that for (1) saturates, for (2) decreases and for (3) increases continuously. These behaviors are due to the competition between antiferromagnetic (t2g ↔ eg) and ferromagnetic (t2g ↔ t2g and eg ↔ eg) interactions to the most dominant exchange pathway, M...N≡C-N...M. A mechanism for the magnetic ordering is proposed.

Original languageEnglish
JournalMolecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals
Volume343
Publication statusPublished - 2000
Externally publishedYes

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ASJC Scopus subject areas

  • Condensed Matter Physics

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