Magnetic properties and exchange couplings of one-dimensionally arrayed 4f-3d heterometallic [Ln2Cu2]n compounds

Atsushi Okazawa, Ryo Watanabe, Hiroyuki Nojiri, Takashi Nogami, Takayuki Ishida

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Heterometallic polymeric coordination compounds [{Ln(hfac)2(CH3OH)}2{Cu(dmg)(Hdmg)}2]n ([Ln2Cu2]n; Ln = Tb, Ho, and Er; H2dmg = dimethylglyoxime; Hhfac = 1,1,1,5,5,5-hexafluoropentane-2,4-dione) were synthesized, and the X-ray crystallographic analysis shows that their structures are isomorphous to those of the known ferrimagnetic [Gd2Cu2]n and [Dy2Cu2]n analogs. The exchange couplings in [Tb2Cu2]n, [Ho2Cu2]n, and [Er2Cu2]n were precisely evaluated by high-frequency EPR and pulsed-field magnetization studies, giving JTb-Cu/kB = -0.77(2) K, JHo-Cu/kB = -0.250(12) K and JEr-Cu/kB = -0.149(15) K. They were comparable to those of the Gd and Dy analogs. The absolute value of the exchange coupling parameter monotonically decreases in the order of Gd, Tb, Dy, Ho, and Er.

Original languageEnglish
Pages (from-to)1808-1813
Number of pages6
JournalPolyhedron
Volume28
Issue number9-10
DOIs
Publication statusPublished - 2009 Jun 22

Keywords

  • EPR
  • Exchange interaction
  • Lanthanide
  • Rare earth metal
  • Single-molecule magnet

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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