Crystal and magnetic structure of the two-dimensional coordination polymers CoCl2(bpy-d8) and NiCl2(bpy-d8)

R. Feyerherm, A. Loose, M. A. Lawandy, Jing Li

Research output: Contribution to journalArticle

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Abstract

Neutron diffraction studies of polycrystalline samples of the two-dimensional coordination polymers CoCl2(bpy-d8) and NiCl2(bpy-d8) (bpy-d8 = 4,4′-bipyridine, fully deuterated) were carried out at various temperatures in order to determine their chemical and magnetically ordered structures. For both compounds, an orthorhombic structure, space group Pban (No. 50), was observed in which infinite chains of (-CoCl2-) or (-NiCl2-) units were cross-linked by the bipyridine ligands. Previous magnetic susceptibility studies of Co- and NiCl2(bpy) revealed long-range antiferromagnetic ordering below 5.0 and 8.5 K, respectively. From the low-temperature neutron diffraction data, a simple magnetic moment arrangement was deduced in which the metal ions are ferromagnetically coupled within the metal-chloride chains and nearest-neighbor chains couple antiferomagnetically. At 1.5K, ordered moments of 2.8(2) and 2.02(2)μB, respectively, were observed with a moment orientation along the metal-bpy-metal bridges.

Original languageEnglish
JournalApplied Physics A: Materials Science and Processing
Volume74
Issue numberSUPPL.I
DOIs
Publication statusPublished - Dec 2002

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Magnetic structure
coordination polymers
Polymers
Crystal structure
Metals
Neutron diffraction
crystal structure
neutron diffraction
metals
moments
Magnetic moments
Magnetic susceptibility
Metal ions
Chlorides
metal ions
magnetic moments
chlorides
Ligands
magnetic permeability
Temperature

ASJC Scopus subject areas

  • Materials Science(all)
  • Physics and Astronomy (miscellaneous)

Cite this

Crystal and magnetic structure of the two-dimensional coordination polymers CoCl2(bpy-d8) and NiCl2(bpy-d8). / Feyerherm, R.; Loose, A.; Lawandy, M. A.; Li, Jing.

In: Applied Physics A: Materials Science and Processing, Vol. 74, No. SUPPL.I, 12.2002.

Research output: Contribution to journalArticle

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AB - Neutron diffraction studies of polycrystalline samples of the two-dimensional coordination polymers CoCl2(bpy-d8) and NiCl2(bpy-d8) (bpy-d8 = 4,4′-bipyridine, fully deuterated) were carried out at various temperatures in order to determine their chemical and magnetically ordered structures. For both compounds, an orthorhombic structure, space group Pban (No. 50), was observed in which infinite chains of (-CoCl2-) or (-NiCl2-) units were cross-linked by the bipyridine ligands. Previous magnetic susceptibility studies of Co- and NiCl2(bpy) revealed long-range antiferromagnetic ordering below 5.0 and 8.5 K, respectively. From the low-temperature neutron diffraction data, a simple magnetic moment arrangement was deduced in which the metal ions are ferromagnetically coupled within the metal-chloride chains and nearest-neighbor chains couple antiferomagnetically. At 1.5K, ordered moments of 2.8(2) and 2.02(2)μB, respectively, were observed with a moment orientation along the metal-bpy-metal bridges.

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