Magnetic ordering in M(ox)(bpy) system (M=Fe, Co, Ni; ox=C2O2-4; bpy=4,4′-bipyridine)

Tan Yuen, C. L. Lin, T. W. Mihalisin, Michael A. Lawandy, Jing Li

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

The temperature and field dependence of the magnetization have been measured to investigate the magnetic properties of the first oxalate-bpy mixed-ligand framework with a general formula M(ox)(bpy) (M = Fe(II), Co(II), Ni(II); ox = C2O2- 4 ; bpy = 4,4′-bipyridine). All compounds in the M(ox)(bpy) system crystallize in an orthorhombic structure with space group Immm (No. 71), in which the magnetic M ions form one-dimensional chains along the a axis. Spontaneous magnetic orderings with transition temperatures of 12, 13, and 26 K have been found for Fe(ox)(bpy), Co(ox)(bpy), and Ni(ox)(bpy), respectively. The nature of the ordering in Ni(ox)(bpy) is antiferromagnetic, however it may exhibit a metamagnetic transition at high magnetic fields. The type of ordering in Fe(ox)(bpy) and Co(ox)(bpy) is also antiferromagnetic but with canting, or so-called weak ferromagnetism. The residual moment resulting from the canting is larger in Fe(ox)(bpy) than in Co(ox)(bpy). The values of μeff obtained by fitting χ(T) indicate a high spin state for M ions in all three compounds. The origin of the magnetic ordering in these compounds is attributed to antiferromagnetic exchange interactions between the M ions through the bridging oxalate molecules along the magnetic chain and interchain M-M couplings along the [111] direction.

Original languageEnglish
Pages (from-to)6001-6003
Number of pages3
JournalJournal of Applied Physics
Volume87
Issue number9 III
Publication statusPublished - May 1 2000

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oxalates
ions
ferromagnetism
temperature distribution
transition temperature
magnetic properties
moments
magnetization
temperature dependence
ligands
magnetic fields
molecules
interactions

ASJC Scopus subject areas

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

Cite this

Yuen, T., Lin, C. L., Mihalisin, T. W., Lawandy, M. A., & Li, J. (2000). Magnetic ordering in M(ox)(bpy) system (M=Fe, Co, Ni; ox=C2O2-4; bpy=4,4′-bipyridine). Journal of Applied Physics, 87(9 III), 6001-6003.

Magnetic ordering in M(ox)(bpy) system (M=Fe, Co, Ni; ox=C2O2-4; bpy=4,4′-bipyridine). / Yuen, Tan; Lin, C. L.; Mihalisin, T. W.; Lawandy, Michael A.; Li, Jing.

In: Journal of Applied Physics, Vol. 87, No. 9 III, 01.05.2000, p. 6001-6003.

Research output: Contribution to journalArticle

Yuen, T, Lin, CL, Mihalisin, TW, Lawandy, MA & Li, J 2000, 'Magnetic ordering in M(ox)(bpy) system (M=Fe, Co, Ni; ox=C2O2-4; bpy=4,4′-bipyridine)', Journal of Applied Physics, vol. 87, no. 9 III, pp. 6001-6003.
Yuen, Tan ; Lin, C. L. ; Mihalisin, T. W. ; Lawandy, Michael A. ; Li, Jing. / Magnetic ordering in M(ox)(bpy) system (M=Fe, Co, Ni; ox=C2O2-4; bpy=4,4′-bipyridine). In: Journal of Applied Physics. 2000 ; Vol. 87, No. 9 III. pp. 6001-6003.
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