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EPR study on higher oxygen pressure synthesized compound Pr2−xGdxCuO4 by V.A Ivanshin; G.V Mamin; A Shengelaya; H Keller; P.W Klamut; A Sikora is a Physics and Astronomy article available to read on EtoBox.

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The electron paramagnetic resonance (EPR) and magnetic susceptibility measurements were performed in Pr 2Ϫx Gd x CuO 4 (x 0.02; 0.05) annealed at the higher oxygen pressures of 15 and 21 bar. This annealing treatment causes a reduction of about 8% in the second order crystalline electric field (CEF) parameter ͉b 2 0 ͉ at the Gd 3ϩ site and leads to a drastic broadening of the Gd 3ϩ resonance lines, which is consistent with spin relaxation processes of Gd 3ϩ due to the first excited state of Pr 3ϩ , an increase in the CEF inhomogeneity upon doping and annealing, and an existence of Pr ions in both 3 ϩ and 4 ϩ oxidation states. The exchange coupling constants j PrϪPr and j GdϪPr are also estimated.

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Author

V.A Ivanshin; G.V Mamin; A Shengelaya; H Keller; P.W Klamut; A Sikora

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0038-1098)

Published

1999

Language

EN

Field

Physics and Astronomy (Physical Sciences)