Effect of cation substitutions in Y-type Ba 0.5 Sr 1.5 Me 2 Fe 12 O 22 hexaferrites on the magnetic phase transitions

Abstract We investigated the magnetic properties and magnetic phase transition in Y-type Ba 0.5 Sr 1.5 NiMgFe 12 O 22 hexaferrite powder prepared by citrate sol-gel spontaneous combustion. The saturation magnetisation value of 32 emu/g at 4.2 K was lowered to 24 emu/g at 300 K. The magnetisations cu...

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Published inJournal of physics. Conference series Vol. 2240; no. 1; p. 12023
Main Authors Georgieva, B, Kolev, S, Ghelev, Ch, Krezhov, K, Kovacheva, D, Vertruyen, B, Closset, R, Tran, L-M, Babij, M, Zaleski, A, Koutzarova, T
Format Journal Article
LanguageEnglish
Published 01.03.2022
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Summary:Abstract We investigated the magnetic properties and magnetic phase transition in Y-type Ba 0.5 Sr 1.5 NiMgFe 12 O 22 hexaferrite powder prepared by citrate sol-gel spontaneous combustion. The saturation magnetisation value of 32 emu/g at 4.2 K was lowered to 24 emu/g at 300 K. The magnetisations curves did not saturate even at a magnetic field of 50 kOe for both temperatures - 4.2 K and 300 K. A step-like behaviour appeared in the initial magnetisation curve at 4.2 K. A magnetic phase transformation from a spiral magnetic ordering to a conical spin one was observed at 40 K.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/2240/1/012023