EPR in YBa2Cu3O7-δ and YBa2Cu3O6+x

F. J. Owens; B. L. Ramakrishna; Z. Iqbal

doi:10.1016/0921-4534(88)90811-8

EPR in YBa₂Cu₃O_7-δ and YBa₂Cu₃O_6+x

F. J. Owens, B. L. Ramakrishna, Z. Iqbal

Engineering of Matter, Transport and Energy, School for (IAFSE-SEMTE)

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Abstract

Electron paramagnetic resonance (EPR) measurements on polycrystalline YBa₂Cu₃O_7-δ prepared via the citrates and the usual ceramic route of firing the oxides and BaCO₃ are reported. The single phase samples of orthorthombic YBa₂Bu₃O_6.9 and tetragonal YBa₂Cu₃O₆ obtained from a citrate precursor do not exhibit an EPR signal. However, a sample of the tetragonal and non-superconducting YBa₂Cu₃O_6.15 prepared from a master sample of citrate-route synthesized YBa₂Cu₃O_6.9 displays an EPR signal whose intensity peaks near 460 K in agreement with neutron diffraction data that show an antiferromagnetic transition in the 400 to 500 K temperature range. A probable explanation for these results is discussed.

Original language	English (US)
Pages (from-to)	221-224
Number of pages	4
Journal	Physica C: Superconductivity and its applications
Volume	156
Issue number	2
DOIs	https://doi.org/10.1016/0921-4534(88)90811-8
State	Published - Sep 1 1988

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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10.1016/0921-4534(88)90811-8

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title = "EPR in YBa2Cu3O7-δ and YBa2Cu3O6+x",

abstract = "Electron paramagnetic resonance (EPR) measurements on polycrystalline YBa2Cu3O7-δ prepared via the citrates and the usual ceramic route of firing the oxides and BaCO3 are reported. The single phase samples of orthorthombic YBa2Bu3O6.9 and tetragonal YBa2Cu3O6 obtained from a citrate precursor do not exhibit an EPR signal. However, a sample of the tetragonal and non-superconducting YBa2Cu3O6.15 prepared from a master sample of citrate-route synthesized YBa2Cu3O6.9 displays an EPR signal whose intensity peaks near 460 K in agreement with neutron diffraction data that show an antiferromagnetic transition in the 400 to 500 K temperature range. A probable explanation for these results is discussed.",

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T1 - EPR in YBa2Cu3O7-δ and YBa2Cu3O6+x

AU - Owens, F. J.

AU - Ramakrishna, B. L.

AU - Iqbal, Z.

PY - 1988/9/1

Y1 - 1988/9/1

N2 - Electron paramagnetic resonance (EPR) measurements on polycrystalline YBa2Cu3O7-δ prepared via the citrates and the usual ceramic route of firing the oxides and BaCO3 are reported. The single phase samples of orthorthombic YBa2Bu3O6.9 and tetragonal YBa2Cu3O6 obtained from a citrate precursor do not exhibit an EPR signal. However, a sample of the tetragonal and non-superconducting YBa2Cu3O6.15 prepared from a master sample of citrate-route synthesized YBa2Cu3O6.9 displays an EPR signal whose intensity peaks near 460 K in agreement with neutron diffraction data that show an antiferromagnetic transition in the 400 to 500 K temperature range. A probable explanation for these results is discussed.

AB - Electron paramagnetic resonance (EPR) measurements on polycrystalline YBa2Cu3O7-δ prepared via the citrates and the usual ceramic route of firing the oxides and BaCO3 are reported. The single phase samples of orthorthombic YBa2Bu3O6.9 and tetragonal YBa2Cu3O6 obtained from a citrate precursor do not exhibit an EPR signal. However, a sample of the tetragonal and non-superconducting YBa2Cu3O6.15 prepared from a master sample of citrate-route synthesized YBa2Cu3O6.9 displays an EPR signal whose intensity peaks near 460 K in agreement with neutron diffraction data that show an antiferromagnetic transition in the 400 to 500 K temperature range. A probable explanation for these results is discussed.

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EPR in YBa₂Cu₃O_7-δ and YBa₂Cu₃O_6+x

Abstract

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