Al-doped MgB2 materials studied using electron paramagnetic resonance and Raman spectroscopy
Authors:
- 16 May 2016
- journal article
- conference paper
- Published by AIP Publishing in Applied Physics Letters
- Vol. 108 (20) , 202601
Abstract
Undoped and aluminum (Al) doped magnesium diboride (MgB2) samples were synthesized using a high-temperature solid-state synthesis method. The microscopic defect structures of Al-doped MgB2 samples were systematically investigated using X-ray powder diffraction, Raman spectroscopy, and electron paramagnetic resonance. It was found that Mg-vacancies are responsible for defect-induced peculiarities in MgB2. Above a certain level of Al doping, enhanced conductive properties of MgB2 disappear due to filling of vacancies or trapping of Al in Mg-related vacancy sites.Keywords
Funding Information
- Deutsche Forschungsgemeinschaft (Er662)
This publication has 49 references indexed in Scilit:
- Defect structure in lithium-doped polymer-derived SiCN ceramics characterized by Raman and electron paramagnetic resonance spectroscopyPhysical Chemistry Chemical Physics, 2009
- Aluminium substitution induced superstructures in Mg1−xAlxB2 (x=0.0 to 0.50): An X-ray diffraction studyPhysica C: Superconductivity and its Applications, 2007
- Effects on transition temperature and Raman spectra of substitution of Cr and Al for Mg in MgB2Physica Status Solidi (b), 2007
- Chemical interactions in Ti doped MgB2superconducting bulk samples and wiresSuperconductor Science and Technology, 2005
- Sonochemical modification of the superconducting properties of MgB2Applied Physics Letters, 2003
- ESR study of the nature of the anomalous suppression of superconductivity in La2−xBaxCuO4Physica C: Superconductivity and its Applications, 1995
- Magnetically modulated microwave absorption in cuprate superconductorsApplied Magnetic Resonance, 1995
- Electron paramagnetic resonance without vortex noise in superconducting Gd doped YBaCuOPhysica C: Superconductivity and its Applications, 1992
- Grain size dependence of microwave absorption in Y1Ba2Cu3O7 powders near TcPhysica C: Superconductivity and its Applications, 1988
- Initial susceptibility and microwave absorption in powder samples of Y1Ba2Cu3O6.9Physica C: Superconductivity and its Applications, 1988