Structures and magnetism of cyano-bridged grid-like two-dimensional 4f-3d arrays

Yuan Zhu Zhang, Gong Ping Duan, Osamu Sato, Song Gao

Research output: Contribution to journalArticle

44 Citations (Scopus)

Abstract

With the introduction of 4,4′-bipyridine N,N′-dioxide (bpdo) ligands, six novel cyano/bpdo mixed-bridged heterometallic 4f-3d compounds {{Ln(iii)(bpdo)(H2O)2M(iii)(CN)6} ·2H2O}n (Ln = Nd(1), Sm(2), Gd(3), Tb(4) with M = Fe; Ln = Nd(5), Sm(6) with M = Co) have been prepared. X-Ray crystallography revealed that they have the same two-dimensional molecular structures, where each [M(CN)6]3- unit uses four co-planar cyanide groups to connect with four square anti-prism Ln3+ ions and, accordingly, each Ln3+ ion links four [M(CN)6]3- units, giving a corrugated grid-like layer and, simultaneously, the next nearest Ln 3+ ions are bridged by bpdo in the diagonal direction. Magnetic studies showed that the Ln3+-Fe3+ interaction is ferromagnetic for NdFe (1), antiferromagnetic for SmFe (2) and GdFe (3), while negligible for TbFe (4). Especially, 2 and 3 exhibited ferrimagnetic orderings below 2.9 and 1.9 K, respectively, with a coercive field of 40 Oe at 1.8 K for 2. Additionally, 5 showed an unusual field-induced magnetization relaxation.

Original languageEnglish
Pages (from-to)2625-2634
Number of pages10
JournalJournal of Materials Chemistry
Volume16
Issue number26
DOIs
Publication statusPublished - 2006

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Chemistry

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