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 and I.R. Harris J. Phys. IV France, 07 C1 (1997) C1-325-C1-326 DOI: 10.1051/jp4:19971129