Publication: Al-doped MgB2 materials studied using electron paramagnetic resonance and Raman spectroscopy
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Erdem, Emre
Repp, Sergej
Weber, Stefan
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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. Published by AIP Publishing.
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American Institute of Physics (AIP) Publishing
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Applied Physics Letters
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10.1063/1.4949338