EPR in YBa2Cu3O7−δ and YBa2Cu3O6+x

✍ Scribed by F.J. Owens; B.L. Ramakrishna; Z. Iqbal

• Publisher: Elsevier Science
• Year: 1988
• Tongue: English
• Weight: 371 KB
• Volume: 156
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/0921-4534(88)90811-8

✦ Synopsis

Electron paramagnetic resonance (EPR) measurements on polycrystalline YBazCu,07-d prepared via the citrates and the usual ceramic route of Bring the oxides and BaC03 are reported. The single phase samples of orthorhombic YBa2Bu3006.9 and tetmgonal YBa,Cu,O, obtained from a citrate precursor do not exhibit an EPR signal. However, a sample of the tetragonal and non-superconducting YBa,Cu,O,, s prepared from a master sample of citrate-route synthesized YBa#Lt306.9 displays an EPR signal whose intensity peaks near 460 Kin 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.