We present the results of x-ray diffraction and magnetization measurements on the nanocrystalline as-cast compound . X-ray diffraction shows the presence of the A15 phase embedded in a matrix of a bcc Nb–Al solid solution. The average grain size of estimated from the line broadening is about . Magnetization measurements give a lower limit of the superconducting transition temperature to be about , which is amongst the highest known for the as-cast sample of . In the superconducting state, the sample shows anomalous thermomagnetic history effects in the temperature and field variation of magnetization.
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Research Article| February 06 2008
Superconducting properties of nanocrystalline in Nb–Al matrix
Puspen Mondal, Meghmalhar Manekar, Ravi Kumar, Tapas Ganguli, S. B. Roy; Superconducting properties of nanocrystalline in Nb–Al matrix. Appl. Phys. Lett. 4 February 2008; 92 (5): 052507. https://doi.org/10.1063/1.2841827
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