Electron paramagnetic resonance spectroscopy of Gd-doped YBa2CU3O6+y crystallites aligned in a magnetic field

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Abstract

Gd EPR spectra of Y0.999Gd0.001Ba2Cu3O6+y (0 ≤ y ≤ 1.) crystallites aligned in a magnetic field are investigated with field parallel to the c crystalline axis. For low oxygen contents (y ≤ 0.1) no spectral change is observed, while for larger oxygen contents all major bands except the central peak split into a pattern of five subbands with y-dependent relative intensities. The five sets of subbands are assigned to oxygen configurations with zero, one, two, three, or four occupied positions in the Cu (1) Oy planes closest to the Gd atom. The spectroscopic parameters g, h20, b40, b60, b44, and b64 determined by an iteration procedure reconstruct well the positions of all allowed and forbidden transitions. Each subsequent oxygen coordination increases b22 by the same amount; this shows that the zero-field splitting depends linearly on the crystal field.

Original languageEnglish
Pages (from-to)540-552
Number of pages13
JournalJournal of Magnetic Resonance (1969)
Volume97
Issue number3
DOIs
Publication statusPublished - 1992

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Crystallites
Paramagnetic resonance
Spectroscopy
Magnetic fields
Oxygen
Crystalline materials
Atoms
Crystals

Cite this

@article{c98e776a88814f0fa68395dffa05849e,
title = "Electron paramagnetic resonance spectroscopy of Gd-doped YBa2CU3O6+y crystallites aligned in a magnetic field",
abstract = "Gd EPR spectra of Y0.999Gd0.001Ba2Cu3O6+y (0 ≤ y ≤ 1.) crystallites aligned in a magnetic field are investigated with field parallel to the c crystalline axis. For low oxygen contents (y ≤ 0.1) no spectral change is observed, while for larger oxygen contents all major bands except the central peak split into a pattern of five subbands with y-dependent relative intensities. The five sets of subbands are assigned to oxygen configurations with zero, one, two, three, or four occupied positions in the Cu (1) Oy planes closest to the Gd atom. The spectroscopic parameters g, h20, b40, b60, b44, and b64 determined by an iteration procedure reconstruct well the positions of all allowed and forbidden transitions. Each subsequent oxygen coordination increases b22 by the same amount; this shows that the zero-field splitting depends linearly on the crystal field.",
author = "A. Rockenbauer and A. J{\'a}nossy and L. Korecz and S. Pekker",
year = "1992",
doi = "10.1016/0022-2364(92)90034-5",
language = "English",
volume = "97",
pages = "540--552",
journal = "Journal of Magnetic Resonance (1969)",
issn = "0022-2364",
publisher = "Academic Press Inc.",
number = "3",

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TY - JOUR

T1 - Electron paramagnetic resonance spectroscopy of Gd-doped YBa2CU3O6+y crystallites aligned in a magnetic field

AU - Rockenbauer, A.

AU - Jánossy, A.

AU - Korecz, L.

AU - Pekker, S.

PY - 1992

Y1 - 1992

N2 - Gd EPR spectra of Y0.999Gd0.001Ba2Cu3O6+y (0 ≤ y ≤ 1.) crystallites aligned in a magnetic field are investigated with field parallel to the c crystalline axis. For low oxygen contents (y ≤ 0.1) no spectral change is observed, while for larger oxygen contents all major bands except the central peak split into a pattern of five subbands with y-dependent relative intensities. The five sets of subbands are assigned to oxygen configurations with zero, one, two, three, or four occupied positions in the Cu (1) Oy planes closest to the Gd atom. The spectroscopic parameters g, h20, b40, b60, b44, and b64 determined by an iteration procedure reconstruct well the positions of all allowed and forbidden transitions. Each subsequent oxygen coordination increases b22 by the same amount; this shows that the zero-field splitting depends linearly on the crystal field.

AB - Gd EPR spectra of Y0.999Gd0.001Ba2Cu3O6+y (0 ≤ y ≤ 1.) crystallites aligned in a magnetic field are investigated with field parallel to the c crystalline axis. For low oxygen contents (y ≤ 0.1) no spectral change is observed, while for larger oxygen contents all major bands except the central peak split into a pattern of five subbands with y-dependent relative intensities. The five sets of subbands are assigned to oxygen configurations with zero, one, two, three, or four occupied positions in the Cu (1) Oy planes closest to the Gd atom. The spectroscopic parameters g, h20, b40, b60, b44, and b64 determined by an iteration procedure reconstruct well the positions of all allowed and forbidden transitions. Each subsequent oxygen coordination increases b22 by the same amount; this shows that the zero-field splitting depends linearly on the crystal field.

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U2 - 10.1016/0022-2364(92)90034-5

DO - 10.1016/0022-2364(92)90034-5

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EP - 552

JO - Journal of Magnetic Resonance (1969)

JF - Journal of Magnetic Resonance (1969)

SN - 0022-2364

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