J. Fidler, T. Schrefl, S. Hoefinger, M. Hajduga, Recent developments in hard magnetic bulk materials, J. Phys. Condens. Matter, 16 (2004), pp. S455–S470 A.K. Pathak, M. Khan, K.A. Gschneidner Jr., R.W. McCallum, L. Zhou, K. Sun, M.J. Kramer, V.K. Pecharsky, Magnetic properties of bulk, and rapidly solidified nanostructured (Nd1-xCex)2Fe14-yCoyB ribbons, Acta Mater., 103 (2016), pp. 211–216 J.F. Herbst, M.S. Meyer, F.E. Pinkerton, Magnetic hardening of Ce2Fe14B, J. Appl. Phys., 111 (7) (2012), pp. 1–3 E.J. Skoug, M.S. Meyer, F.E. Pinkerton, M.M. Tessema, D. Haddad, J.F. Herbst, Crystal structure and magnetic properties of Ce2Fe14−xCoxB alloys, J. Alloys. Compd., 574 (15) (2013), pp. 552–555 K. Maaz, A. Mumtaz, S.K. Hasanain, A. Ceylan, Synthesis and magnetic properties of cobalt ferrite (CoFe2O4) nanoparticles prepared by wet chemical route, J. Magn. Magn. Mater., 308 (2007), pp. 289–295 T. Wang, D. Kevorkov, M. Medraj, Phase equilibria and magnetic phases in the Ce-Fe-Co-B system, Materials, 10 (1) (2017), p. 16 Q.M. Lu, M. Yue, H.G. Zhang, M.L. Wang, F. Yu, Q.Z. Huang, D.H. Ryan, Z. Altounian, Intrinsic magnetic properties of single-phase Mn1+xGa (0