Cation substitutions; Hexaferrites; Initial magnetization curve; Magnetic phase transformations; Magnetic-field; Magnetic-phase transition; Magnetization curves; Magnetization values; Spiral magnetic orders; Physics and Astronomy (all)
Abstract :
[en] We investigated the magnetic properties and magnetic phase transition in Y-type Ba0.5Sr1.5NiMgFe12O22 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.
Disciplines :
Chemistry Physics
Author, co-author :
Georgieva, B.; Institute of Electronics, Bulgarian Academy of Sciences, Sofia, Bulgaria
Kolev, S.; Institute of Electronics, Bulgarian Academy of Sciences, Sofia, Bulgaria ; Neofit Rilski South-Western University, 66 Ivan Mihailov Str., Blagoevgrad, Bulgaria
Ghelev, Ch; Institute of Electronics, Bulgarian Academy of Sciences, Sofia, Bulgaria
Krezhov, K.; Institute of Electronics, Bulgarian Academy of Sciences, Sofia, Bulgaria
Kovacheva, D.; Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, Sofia, Bulgaria
Vertruyen, Bénédicte ; Université de Liège - ULiège > Département de chimie (sciences) > Chimie inorganique structurale
Closset, Raphaël ; Université de Liège - ULiège > Département de chimie (sciences)
Tran, L.-M.; Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Wrocław, Poland
Babij, M.; Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Wrocław, Poland
Zaleski, A.; Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Wrocław, Poland
Koutzarova, T.; Institute of Electronics, Bulgarian Academy of Sciences, Sofia, Bulgaria
Language :
English
Title :
Effect of cation substitutions in Y-type Ba0.5Sr1.5Me2Fe12O22hexaferrites on the magnetic phase transitions
Publication date :
04 April 2022
Event name :
22nd International Summer School On Vacuum, Electron and Ion Technologies (VEIT 2021)
Ministry of Education and Science BNSF - Bulgarian National Science Fund WBI - Wallonie-Bruxelles International
Funding text :
This study is financed by the BNSF, contract KP-06-N48/5 "Multifunctional composite structures based on ferrites (including magnetoelectrics) and carbon materials". B. Georgieva would like to acknowledge the assistance of the Bulgarian Ministry of Education and Science under the National Research Program "Young scientists and postdoctoral students" approved by DCM # 577/17.08.2018. The research is carried out in the framework of a joint project between the Bulgarian Academy of Sciences and WBI, Belgium, and a joint project between the Bulgarian Academy of Sciences and W. Trzebiatowski Institute of Low Temperature and Structure Research, Polish Academy of Sciences.
