Ion beam analysis and EPR studies for GdBa2Cu3-xRuxO7-δ superconducting phase

被引：5
作者：
Awad, R. [1 ]
Abou-Aly, A. I. [1 ]
Roumie, M. [2 ]
Mahmoud, S. A. [1 ]
Barakat, M. Me. [1 ]
机构：
[1] Univ Alexandria, Fac Sci, Dept Phys, Alexandria 21511, Egypt
[2] Natl Council Sci Res, Lebanese Atom Energy Commiss, Accelerator Lab, Beirut 8281, Lebanon
来源：
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2012年 / 477卷
关键词：
Gd-123; Ru-content; PIXE and RBS techniques; EPR spectra; ELECTRON-PARAMAGNETIC-RESONANCE; MAGNETIC-PROPERTIES; CRYSTAL-STRUCTURE; SINGLE-CRYSTAL; GDBA2CU3O7-DELTA; SYSTEM; OXYGEN; FIELD; OXIDE; LOCALIZATION;
D O I：
10.1016/j.physc.2012.02.015
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Superconducting samples of the type GdBa(2)Cu(3-x)RuxO(7-delta) with 0.000 <= x <= 0.300 were prepared by the conventional solid-state reaction technique. The phase formation percentage, lattice parameters, orthorhombic distortion and oxygen-content were calculated using X-ray powder diffraction (XRD) data. The real elemental-content of the prepared samples was estimated from particle induced X-ray emission (PIXE). In addition, the oxygen-content was determined using elastic Rutherford backscattering spectroscopy (RBS) technique at 3 MeV proton beam and Rietveld XRD analysis. Moreover, the prepared samples were investigated using electron paramagnetic resonance (EPR) measurements. The number of spins N participating in EPR resonance and the paramagnetic susceptibility chi were calculated as a function of both Ru-content and temperature. In addition, the activation energy E-a, Curie constant C, Curie temperature theta, the effective magnetic moment mu and the electronic specific heat coefficient gamma were estimated as a function of Ru-content. (C) 2012 Elsevier B.V. All rights reserved.
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页码：74 / 83
页数：10
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