Byeon, SC Hong, KS Je, HJ 2024-01-21T18:32:45Z 2024-01-21T18:32:45Z 2021-09-01 1997-05 0025-5408 https://pubs.kist.re.kr/handle/201004/143837 A systematic variation in initial permeability with oxygen partial pressure during post sintering cooling was observed in Mn0.47Zn0.47Fe2.06O4 polycrystalline samples. The initial permeability increased from 6300 to 8600 when the atmospheric parameter decreased from 8.4 to 6.4. Here atmospheric parameter is the degree of oxygen partial pressure engaged in the cooling stage of the sample preparation. The origins of this systematic variation were investigated by measuring the saturation magnetization under high fields (10 kOe) and by observing microstructure changes as well as the magnetic properties under small applied fields (0.15 mOe). It was found that saturation magnetization of samples under high fields was almost unchanged in the range of oxygen partial pressures through which Fe2+ concentration varied by up to 0.5%. The systematic changes in saturated magnetization and saturation time under small applied fields suggest that the permeability is strongly dependent on domain mobility. This increase in domain mobility was attributed to increased grain growth with decreasing oxygen partial pressure. Copyright (C) 1997 Elsevier Science Ltd. English PERGAMON-ELSEVIER SCIENCE LTD Oxygen partial pressure dependent magnetic properties of manganese-zinc ferrite polycrystals Article 10.1016/S0025-5408(97)00009-3 1 MATERIALS RESEARCH BULLETIN, v.32, no.5, pp.579 - 588 MATERIALS RESEARCH BULLETIN 32 5 579 588 scie scopus A1997WY26400013 2-s2.0-0031139276 Materials Science, Multidisciplinary Materials Science Article ceramics magnetic materials magnetic properties microstructure