title   
  

High-quality MgB2 nanocrystals synthesized by using modified amorphous nano-boron powders: study of defect structures and superconductivity properties

Bateni, Ali and Erdem, Emre and Hassler, Wolfgang and Somer, Mehmet (2019) High-quality MgB2 nanocrystals synthesized by using modified amorphous nano-boron powders: study of defect structures and superconductivity properties. AIP Advances, 9 (4). ISSN 2158-3226

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Official URL: http://dx.doi.org/10.1063/1.5089488

Abstract

Nano sized magnesium diboride (MgB2) samples were synthesized using various high-quality nano-B precursor powders. The microscopic defect structures of MgB2samples were systematically investigated using X-ray powder diffraction, Raman, resistivity measurements and electron paramagnetic resonance spectroscopy. A significant deviation in the critical temperature Tc was observed due to defects and crystal distortion. The symmetry effect of the latter is also reflected on the vibrational modes in the Raman spectra. Scanning electron microscopy analysis demonstrate uniform and ultrafine morphology for the modified MgB2. Defect center in particular Mg vacancies influence the connectivity and the conductivity properties which are crucial for the superconductivity applications.

Item Type:Article
Subjects:Q Science > Q Science (General)
Q Science > QC Physics
ID Code:37180
Deposited By:Emre Erdem
Deposited On:19 Jun 2019 15:39
Last Modified:19 Jun 2019 15:39

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