Effect of Ni and Al substitution on the magnetic properties of Y-type hexaferrite Ba 0.5 Sr 1.5 Zn 0.5 Ni 1.5 Fe 11.92 Al 0.08 O 22 powders

• Published in: Journal of physics. Conference series Vol. 1859; no. 1; p. 12067
• Main Authors: Georgieva, B, Kolev, S, Krezhov, K, Ghelev, Ch, Kovacheva, D, Tran, L-M, Babij, M, Zaleski, A, Vertruyen, B, Closset, R, Koutzarova, T
• Format: Journal Article
• Language: English
• Published: 01.03.2021
• ISSN: 1742-6588; 1742-6596
• DOI: 10.1088/1742-6596/1859/1/012067

Abstract The effect is reported of substituting the non-magnetic Zn 2+ cations with magnetic Ni 2+ cations, and of the magnetic Fe 3+ cations with non-magnetic Al 3+ cations in Ba 0.5 Sr 1.5 Zn 0.5 Ni 1.5 Fe 11.92 Al 0.08 O 22 on the resulting magnetic properties. The Y-type hexaferrite powders were synthesized by citric acid sol-gel auto-combustion, followed by appropriate thermal annealing. The saturation magnetization values ( M s ) in a magnetic field of 50 kOe were 36 emu/g and 30 emu/g at 4.2 K and 300 K, respectively. The zero-field-cooled (ZFC) and field-cooled (FC) magnetization vs. temperature (4.2 – 300 K) were measured in dc magnetic fields of 50 Oe, 100 Oe and 500 Oe. The changes resulting from the dissimilar cationic substitutions were identified and discussed.