Optical spectroscopy of low-dimensional rare-earth iron borates

The family of RFe 3(BO 3) 4 borates (R=Pr, Nd, Eu–Er, Y) was studied by high-resolution optical absorption and Raman spectroscopies. Structural and magnetic phase transitions were detected and the types of magnetic structure were determined. Energy of crystal-field (CF) levels and exchange splitting...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2009-04, Vol.321 (7), p.716-719
Main Author: Popova, M.N.
Format: Article
Language:English
Subjects:
Crystal field
Magnetic oxides
Optical spectroscopy
Phase transitions
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Summary:The family of RFe 3(BO 3) 4 borates (R=Pr, Nd, Eu–Er, Y) was studied by high-resolution optical absorption and Raman spectroscopies. Structural and magnetic phase transitions were detected and the types of magnetic structure were determined. Energy of crystal-field (CF) levels and exchange splitting of the ground state of the R 3+ ion were obtained from the analysis of optical spectra. CF calculations were carried out. Effective magnetic field at the R 3+ site was found, using the calculated value of the magnetic g-factor. Some peculiarities of modeling the paramagnetic susceptibility of NdFe 3(BO 3) 4 are discussed.
ISSN:0304-8853
DOI:10.1016/j.jmmm.2008.11.033