Rev.Adv.Mater.Sci.(RAMS)
No 2, Vol. 12, 2006, pages 106-111

MAGNETIC LOW DIMENSIONAL EFFECTS IN (Dy0.375Y0.625)2Cu2O5 STUDIED BY ESR SPECTROSCOPY

J. Typek and N. Guskos

Abstract

The powder sample of (Dy0.375Y0.625)2Cu2O5 solid solution has been synthesized by the solid state reaction method. X-ray characterization showed that the sample is single phase with the following orthorhombic lattice parameters: a=1.0817 nm, b=0.3502 nm, c=1.2462 nm. Electron spin resonance (ESR) measurements of this compound has been carried on a Bruker E500 X-band spectrometer in the 4-300K temperature range. A single Lorentzian-shaped resonance line has been registered with changing integrated intensity, linewidth and resonance field. The integrated intensity of the resonance line showed a pronounced maximum at 21K and vanished at the transition to the antiferromagnetic ordering at TN=11K. Below 50K, on approach to TN, the linewidth exhibited a divergent behavior due to the onset of three-dimensional magnetic order. The observed changes of the ESR parameters are interpreted in terms of the low dimensional magnetism of the copper-oxygen system in (Dy0.375Y0.625)2Cu2O5.

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