Effect of rare-earth co-doping on the microstructural and magnetic properties of BaFe12O19

Güler, P.; Ertuğ, B.; İpek-Işıkcı, N.; Kara, A.

doi:10.2478/adms-2020-0014

Artykuł - szczegóły

Tytuł artykułu

Effect of rare-earth co-doping on the microstructural and magnetic properties of BaFe12O19

Autorzy

Güler P. , Ertuğ B. , İpek-Işıkcı N. , Kara A.

Wybrane pełne teksty z tego czasopisma

http://content.sciendo.com/view/journals/adms/adms-overview.xml

Identyfikatory

DOI

10.2478/adms-2020-0014

Warianty tytułu

Języki publikacji

Abstrakty

Ba_0.85(La,Y)_0.15Fe₁₂O₁₉ hexaferrite magnets were produced using the powder metallurgy method. The phase analysis of the ferrite magnets was carried out by X-ray diffraction (XRD) technique. A single hexaferrite phase was present in both samples as revealed by XRD patterns. The microstructural evolution in the hexaferrite samples was examined using Scanning Electron Microscopy (SEM) equipped with Energy Dispersive X-Ray Spectroscopy (EDS). The grain morphology altered with the sintering temperature. Room temperature ferrimagnetic hysteresis curves were obtained by Vibrating Sample Magnetometer (VSM). The crystallite size and the lattice parameters (a,c) were also calculated after sintering at 1150ºC and 1250ºC. Saturation magnetizations, Ms were determined to be 48.60 emu/g and 52.95 emu/g for the samples sintered at 1150ºC and 1250ºC, respectively whereas the remanent magnetizations, Mr were 29.26 emu/g and 31.17 emu/g. The coercivity, Hc decreased from 3.95 kOe to the value of 2.44 kOe with the sintering temperature due to the increase of the crystallite size. The squareness ratios (Mr/Ms) of the ferrimagnetic samples were different because the uniaxial anisotropies altered after sintering at 1150ºC and 1250ºC. The maximum energy product, (BH)max dropped from 35.81 kJ/m³ to 27.38 kJ/m³ when the sintering temperature increased. This result can be attributed to a combination of higher magnetization and the lower coercivity.

Słowa kluczowe

hexaferrites powder metallurgy co-doping ferrimagnetic

heksaferryty metalurgia proszków współdomieszkowanie ferrimagnetyki

Wydawca

Politechnika Gdańska

Czasopismo

Advances in Materials Science

Rocznik

2020

Tom

Vol. 20, nr 3(65)

Strony

23--35

Opis fizyczny

Bibliogr. 57 poz., rys., tab.

Twórcy

autor

Güler P.

Nişantaşı University, Department of Mechanical Engineering, 34398-Istanbul, Turkey

autor

Ertuğ B.

burcu.ertug@nisantasi.edu.tr

Nişantaşı University, Department of Mechatronics Engineering, 34398 -Istanbul, Turkey

autor

İpek-Işıkcı N.

Nişantaşı University, Department of Genetics and Bioengineering, 34398-Istanbul, Turkey

autor

Kara A.

Eskişehir Technical University, Department of Materials Science and Engineering, 26555- Eskişehir, Turkey

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).

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Bibliografia

Identyfikator YADDA

bwmeta1.element.baztech-87aaa10b-1671-47a6-98a5-d6f5a888cc52