The Influence of La2O3 Substitution on the Structure and Properties of Sr Hexaferrite N.K. Dung, D.L. Minh, B.T. Cong, N. Chau et N.X. Phuc J. Phys. IV France, 07 C1 (1997) C1-313-C1-314 DOI: 10.1051/jp4:19971123