Crossover effects in scheelite DyLiF4

The Zeeman effect, magnetization, and differential susceptibility of a DyLiF4 crystal in a pulsed magnetic field are studied experimentally and theoretically. It is found that Dy3+ ion levels in DyLiF4 approach each other and a crossover occurs in a magnetic field H ‖ [001], which leads to a smearin...

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Bibliographic Details
Published in:Physics of the solid state 2006-04, Vol.48 (4), p.726-735
Main Authors: Kazei, Z. A., Snegirev, V. V., Chanieva, R. I., Abdulsabirov, R. Yu, Korableva, S. L.
Format: Article
Language:English
Subjects:
Crossovers
Crystal structure
Electronic structure
Inflection points
Low temperature
Magnetic anomalies
Magnetic fields
Magnetic permeability
Magnetism
Magnetization
Magnetization curves
Scheelite
Zeeman effect
Zircon
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Summary:The Zeeman effect, magnetization, and differential susceptibility of a DyLiF4 crystal in a pulsed magnetic field are studied experimentally and theoretically. It is found that Dy3+ ion levels in DyLiF4 approach each other and a crossover occurs in a magnetic field H ‖ [001], which leads to a smearing of peaks in the differential magnetic susceptibility dM/dH and to inflection points in the magnetization curves M(H) at low temperatures. It is demonstrated that magnetic anomalies that accompany the crossover in DyLiF4 in a field H ‖[001] are sensitive to the electronic structure of the Dy3+ ion. Therefore, these anomalies can be used to refine the crystal-field parameters. The effects of variations in the crystal field and temperature and of a deviation of the direction of the magnetic field from the symmetry axis on the magnitude and character of the magnetic anomalies associated with the crossover are investigated. The crystal field and crossover effects in the scheelite structure are compared with those in the zircon structure.
ISSN:1063-7834
1090-6460
DOI:10.1134/S1063783406040184