Magnetic study of Cr ion in M2CrV3O11−x (MZn, Mg) compounds |
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| Authors: | A Worsztynowicz SM Kaczmarek M Bosacka |
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| Institution: | a Institute of Physics, Szczecin University of Technology, Al. Piastów 48, 70-310 Szczecin, Poland
b Department of Inorganic and Analytical Chemistry, Szczecin University of Technology, Al. Piastów 42, 70-310 Szczecin, Poland |
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| Abstract: | 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≈2.0 (type I) and g≈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. |
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| Keywords: | Chromium vanadates with Zn Mg Structure EPR Magnetic susceptibility Chromium pairs |
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