Limiting negative zero-field splitting in tetrakis(imidazole)bis(acetato) nickel(II) complex

Magnetic properties of bis(acetato-O)tetrakis(imidazole-N3)nickel(II) have been investigated by low-temperature magnetic susceptibility as well as high-field magnetisation and subjected to theoretical analysis. A simultaneous fitting of susceptibility and magnetisation gave the following set of magn...

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Bibliographic Details
Published in:Chemical physics letters 2003-05, Vol.373 (3), p.402-410
Main Authors: Boča, Roman, Dlháň, Lubor, Haase, Wolfgang, Herchel, Radovan, Mašlejová, Anna, Papánková, Blažena
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Magnetic properties and materials
Magnetically ordered materials: other intrinsic properties
Physics
Saturation moments and magnetic susceptibilities
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Summary:Magnetic properties of bis(acetato-O)tetrakis(imidazole-N3)nickel(II) have been investigated by low-temperature magnetic susceptibility as well as high-field magnetisation and subjected to theoretical analysis. A simultaneous fitting of susceptibility and magnetisation gave the following set of magnetic parameters: g z =2.181, g x =2.039, and D/ hc=−22.3 cm −1. Thanks to the magnetisation measurements the sign of the axial zero-field splitting parameter is fixed unambiguously. The negative value of the D-parameter, unexpected for the geometry of an elongated tetragonal bipyramid, is understandable by introducing different orbital reduction factors for axial (acetate) and equatorial (imidazole) ligands.
ISSN:0009-2614
1873-4448
DOI:10.1016/S0009-2614(03)00604-3