Reexamination of the magnetic properties of Cu2(dca)4(2,5-me2pyz) {dca = dicyanamide; me2pyz = dimethylpyrazine}:: isolated spin-1/2 dimers versus long-range magnetic ordering

被引：23

作者：

Manson, JL

Schlueter, JA

Koo, HJ

Whangbo, MH

机构：

[1] Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA

[2] Eastern Washington Univ, Dept Chem & Biochem, Cheney, WA 99004 USA

[3] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA

[4] N Carolina State Univ, Dept Chem, Raleigh, NC 27695 USA

来源：

INORGANIC CHEMISTRY | 2004年 / 43卷 / 13期

关键词：

D O I：

10.1021/ic0354769

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The magnetic properties of Cu-2(dca)(4)(2,5-me(2)pyz) have been reexamined. The extended structure of Cu-2(dca)(4)(2,5-me(2)pyz) can be viewed in terms of Cu-2(2,5-me(2)pyz)(4+) dimer units interconnected via mu(1,5)-dca ligands. The bulk magnetic susceptibility chi(T) and the isothermal M(H) of Cu-2(dca)(4)(2,5-me(2)pyz) are shown to be well described by an isolated dimer model. This finding was confirmed by carrying out a spin dimer analysis based on tight-binding calculations, which shows that the 2,5-me(2)pyz ligand provides a substantial spin exchange interaction between the Cu2+ ions while the dca ligands do not.

引用

页码：4007 / 4011

页数：5

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