https://doi.org/10.1007/s100510170001
EPR study of Dy3+ ions in DyBa2Cu3O6+x
1
Department of Applied Mathematics and Physics, National Technical University,
157 80 Athens, Greece
2
Solid State Section, Department of Physics, University of Athens, 157 84 Zografos,
Panepistimiopolis, Athens, Greece
3
Institute of Physics, Technical University of Szczecin, Al. Piastow 17,
70 310 Szczecin, Poland
Corresponding author: a typjan@arcadia.tuniv.szczecin.pl
Received:
3
June
2001
Published online: 15 November 2001
Concentrated polycrystalline DyBa2Cu3O6+x compounds are studied by X-band EPR spectroscopy. A broad resonance line due to the highly anisotropic EPR spectrum of Dy3+ ions is identified on several specimens at low temperatures. Powder simulation of the EPR spectra complies with the ground Kramers doublet predicted by crystal field analysis of Dy3+ ions. Calculations of the second and fourth moments of the resonance lines due to the dipole-dipole interactions of Dy3+ indicate the presence of substantial exchange narrowing of the dipolar-broadened EPR linewidth.
PACS: 76.30.-v – Electron paramagnetic resonance and relaxation / 74.70.-b – Superconducting materials (excluding high-Tc compounds)
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2001