TY - JOUR

T1 - Effect of 10 MeV electron irradiation on structural and magnetic properties of Ti- and Al- substituted strontium hexaferrite SrFe11.3Ti0.4Al0.3O19

AU - Korkh, Y.V.

AU - Lobanov, A.D.

AU - Shishkin, D.A.

AU - Cherkasova, N.A.

AU - Zhivulin, V.E.

AU - Gudkova, S.A.

AU - Vinnik, D.A.

AU - Patrakov, E.I.

AU - Irkhin, V.Y.

AU - Sarychev, M.N.

AU - Ivanov, V.Y.

AU - Kuznetsova, T.V.

N1 - Export Date: 19 October 2024 CODEN: JALCE Адрес для корреспонденции: Korkh, Y.V.; M.N. Mikheev Institute of Metal Physics of Ural Branch of Russian Academy of Sciences, 18 S. Kovalevskaya Street, Russian Federation, Russian Federation; эл. почта: korkh@imp.uran.ru Сведения о финансировании: Ministry of Education and Science of the Russian Federation, Minobrnauka Сведения о финансировании: Russian Science Foundation, RSF, 23-72-00067 Сведения о финансировании: Ministry of Science and Higher Education of the Russian Federation, 075-15-2024-632 Сведения о финансировании: Saint Petersburg State University, SPbU, 124032600009-5 Текст о финансировании 1: This research in the part of conceptualization, scanning electron microscopy, atomic force microscopy, magnetic-force microscopy, vibrating sample magnetometry, and Raman spectroscopy investigations was supported by the Russian Science Foundation (Project No. 23-72-00067). The work in the part of the crystal growth was supported by the Ministry of Science and Higher Education of the Russian Federation grant No. 075-15-2024-632. The work in the part of initial characterization (SEM/EDS/XRD) was supported by the St. Petersburg State University grant 124032600009-5. The research was carried out using the equipment of the Collaborative Access Center (Testing Center of Nanotechnology and Advanced Materials of the IMP UB RAS). Текст о финансировании 2: This research in the part of conceptualization, scanning electron microscopy, atomic force microscopy, magnetic-force microscopy, vibrating sample magnetometry, and Raman spectroscopy investigations was supported by the Russian Science Foundation (Project No. 23-72-00067). The work in the part of the crystal growth was supported by Russian Ministry of Science and Higher Education (No. 075-15-2024-632). The work in the part of initial characterization (SEM/EDS/XRD) was supported by the St. Petersburg State University grant 124032600009-5. The research was carried out using the equipment of the Collaborative Access Center (Testing Center of Nanotechnology and Advanced Materials of the IMP UB RAS).

PY - 2024/12/1

Y1 - 2024/12/1

N2 - The irradiation stability of Ti- and Al-substituted SrFe11.3Ti0.4Al0.3O19 strontium hexaferrite to 10 MeV electron irradiation with the fluences of 1014 and 2·1017 cm−2 was investigated using various characterization techniques such as scanning electron microscopy, X-ray diffraction, energy dispersive X-ray spectrum microanalysis, atomic force microscopy, Raman spectroscopy, vibrating sample magnetometry and magnetic force microscopy. Notable changes in lattice vibrations, magnetic domain microstructure and magnetization behavior were obtained after the electron irradiation with the fluence of 2·1017 cm−2. Phonon hardening observed by Raman spectroscopy confirms the increasing disorder in crystalline structure and the presence of spin-phonon coupling in the samples after electron irradiation with the fluence 2·1017 cm−2. It was found that the strongest spin-phonon interactions correspond to A1g vibration modes at trigonal bipyramidal 2b, 2a octahedral, 4f1 tetrahedral sites and E1g mode at 4f2 octahedral site in electron-irradiated SrFe11.3Ti0.4Al0.3O19 hexaferrite, while the most radiation-resistant phonon mode is A1g vibration of the Fe–O bonds at the 4f2 octahedral site. No significant change was observed in magnetic saturation magnitude after electron irradiation. The increase in coercivity and significant decrease of magnitude of the dM/dH derivative of magnetization curves with increasing radiation fluence is attributed to the increase in uniaxial magnetic-crystalline anisotropy. It is found that the fractal dimension of hierarchical magnetic domain structure in SrFe11.3Ti0.4Al0.3O19 continuously decreases with increasing fluence of 10 MeV electron irradiation, which can be caused by the distortion in uniaxial magnetocrystalline anisotropy and irradiation-induced defects. © 2024 Elsevier B.V.

AB - The irradiation stability of Ti- and Al-substituted SrFe11.3Ti0.4Al0.3O19 strontium hexaferrite to 10 MeV electron irradiation with the fluences of 1014 and 2·1017 cm−2 was investigated using various characterization techniques such as scanning electron microscopy, X-ray diffraction, energy dispersive X-ray spectrum microanalysis, atomic force microscopy, Raman spectroscopy, vibrating sample magnetometry and magnetic force microscopy. Notable changes in lattice vibrations, magnetic domain microstructure and magnetization behavior were obtained after the electron irradiation with the fluence of 2·1017 cm−2. Phonon hardening observed by Raman spectroscopy confirms the increasing disorder in crystalline structure and the presence of spin-phonon coupling in the samples after electron irradiation with the fluence 2·1017 cm−2. It was found that the strongest spin-phonon interactions correspond to A1g vibration modes at trigonal bipyramidal 2b, 2a octahedral, 4f1 tetrahedral sites and E1g mode at 4f2 octahedral site in electron-irradiated SrFe11.3Ti0.4Al0.3O19 hexaferrite, while the most radiation-resistant phonon mode is A1g vibration of the Fe–O bonds at the 4f2 octahedral site. No significant change was observed in magnetic saturation magnitude after electron irradiation. The increase in coercivity and significant decrease of magnitude of the dM/dH derivative of magnetization curves with increasing radiation fluence is attributed to the increase in uniaxial magnetic-crystalline anisotropy. It is found that the fractal dimension of hierarchical magnetic domain structure in SrFe11.3Ti0.4Al0.3O19 continuously decreases with increasing fluence of 10 MeV electron irradiation, which can be caused by the distortion in uniaxial magnetocrystalline anisotropy and irradiation-induced defects. © 2024 Elsevier B.V.

KW - Crystal structure

KW - Magnetic domain structure

KW - Magnetic force microscopy

KW - Raman spectroscopy

KW - Strontium hexaferrite

KW - Atomic emission spectroscopy

KW - Crystal atomic structure

KW - Energy dispersive spectroscopy

KW - Grain boundaries

KW - Iron

KW - Lattice vibrations

KW - Light metals

KW - Magnetic after effect

KW - Magnetic anisotropy

KW - Magnetocrystalline anisotropy

KW - Magnetometry

KW - Saturation magnetization

KW - Strontium alloys

KW - Strontium compounds

KW - Strontium deposits

KW - Titanium dioxide

KW - Characterization techniques

KW - Crystals structures

KW - Fluences

KW - Irradiation stabilities

KW - Magnetic-domain structures

KW - Magnetic-force microscopy

KW - MeV-Electrons

KW - Octahedral sites

KW - Structural and magnetic properties

KW - Fractal dimension

UR - https://www.mendeley.com/catalogue/75e420ed-bc9a-3ed1-9e5a-cf066de3fa20/

U2 - 10.1016/j.jallcom.2024.176672

DO - 10.1016/j.jallcom.2024.176672

M3 - статья

VL - 1008

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

SN - 0925-8388

ER -