MAGNETIC-INTERACTIONS AND SINGLE-ION ZERO-FIELD-SPLITTING EFFECTS IN THE 2-SUBLATTICE MANGANESE CHAIN MNMN(EDTA).9H2O - MAGNETISM AND SINGLE-CRYSTAL EPR-SPECTRA

被引：26

作者：

BORRASALMENAR, JJ

BURRIEL, R

CORONADO, E

GATTESCHI, D

GOMEZGARCIA, CJ

ZANCHINI, C

机构：

[1] UNIV VALENCIA,DEPT QUIM INORGAN,E-46100 BURJASSOT,SPAIN

[2] UNIV ZARAGOZA,CSIC,INST CIENCIA MAT ARAGON,E-50009 ZARAGOZA,SPAIN

[3] UNIV FIRENZE,DIPARTIMENTO CHIM,I-50144 FLORENCE,ITALY

来源：

INORGANIC CHEMISTRY | 1991年 / 30卷 / 05期

关键词：

D O I：

10.1021/ic00005a014

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

We report on the magnetic susceptibility data and single-crystal EPR spectra of the two-sublattice chain complex MnMn(EDTA).9H2O. Its structure consists of infinite zigzag chains parallel to the a axis of the orthorhombic cell with alternating hexand heptacoordinated metal sites bridged by carboxylate groups: ...Mn(H2O)4O2-Mn(EDTA)(H2O)-Mn(H2O)4O2... The magnetic susceptibility data measured in the 1.1-300 K temperature range show a maximum at about 3 K, which agrees with the presence of an antiferromagnetic intrachain interaction (J = -0.5 cm-1), and a sharp peak at T(c) = 1.489 (2) K, which indicates that the material is a weak ferromagnet in the ordered state. An analysis of the EPR spectra indicates that dipolar interactions between the paramagnetic centers cannot explain the broadening of the lines. A broadening mechanism arising from manganese zero-field splitting is suggested.

引用

页码：947 / 950

页数：4

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