Treatment of Strontium Hexaferrite Powder Synthesized Conventionally to Produce High Coercivity S.A. Seyyed Ebrahimi, AJ. Williams, N. Martinez, A. Ataie, A. Kianvash, C.B. Ponton et I.R. Harris J. Phys. IV France, 07 C1 (1997) C1-325-C1-326 DOI: 10.1051/jp4:19971129