Magnetic study of Cr3+ ion in M2CrV3O11-x (M=Zn, Mg) compounds

被引：9
|
作者：
Worsztynwicz, A
Kaumarek, SM
Kurzawa, M
Bosacka, M
机构：
[1] Szezecin Univ Technol, Inst Phys, PL-70310 Szczecin, Poland
[2] Szezecin Univ Technol, Dept Inorgan & Analyt Chem, PL-70310 Szczecin, Poland
来源：
JOURNAL OF SOLID STATE CHEMISTRY | 2005年 / 178卷 / 07期
关键词：
chromium vanadates with Zn; Mg; structure; EPR; magnetic susceptibility; chromium pairs;
D O I：
10.1016/j.jssc.2005.04.033
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Electron paramagnetic resonance (EPR) and magnetic susceptibility measurements on the recently synthesized vanadates M2CrV3O11-x (M = Zn, Mg) have been analyzed. Two absorption lines with g approximate to 2.0 (type I) and g approximate to 1.98 (type II) were recorded in the EPR spectra, which can be attributed to V4+ ions and Cr3+ ion clusters (pairs), respectively. The exchange constant J between Cr3+ ions has been calculated, using both EPR and magnetic susceptibility data. Fitting of the EPR and magnetic susceptibility data has been carried out. The sign of J is a negative one for all samples and indicates antiferromagnetic interactions. Some difference in the J constant value among samples has been obtained. Volumetric titration confirms distinctly the presence of vanadium V4+ ions in the investigated compounds. (c) 2005 Elsevier Inc. All rights reserved.
引用
收藏
页码：2231 / 2236
页数：6
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