Structural and magnetic studies of the nanocrystalline Nd-Fe-B-Nb alloy ribbonsM. Szwaja, K. Pawlik, P. Pawlik, W. Kaszuwara, J. J. Wysłocki and P. GębaraEPJ Web of Conferences, 40 (2013) 06003DOI: https://doi.org/10.1051/epjconf/20134006003