TY - JOUR
T1 - Structural and microwave absorption properties of BaFe(12–2x) SnxZnxO19 (x=0.05–1.0) ceramic magnets
AU - Taryana, Yana
AU - Wahyu, Yuyu
AU - Manaf, Azwar
AU - Manawan, M.
AU - Adi, Wisnu Ari
N1 - Funding Information:
We are thankful for the financial support provided by the Directorate of Research and Community Service Universitas Indonesia under research project PUTI-Q3 2020 and contract no. NKB-1943/UN2.RST/HKP.05.00/2020. The authors gratefully acknowledge the support of Materials Science Universitas Indonesia and the Radar Lab of Center for Electronics and Telecommunication, National Research and Innovation Agency, Indonesia for facilities research.
Publisher Copyright:
© 2022 Acta Materialia Inc.
PY - 2022/6
Y1 - 2022/6
N2 - A series of single-phase samples with BaFe(12–2x) SnxZnxO19 (x = 0.05, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.5, 0.7, and 1.0) compositions were successfully fabricated using a mechanical alloying technique. The ionic positions Zn2+ and Sn4+ occupy the same site as the Fe3+ions occupying tetrahedral and octahedral sites, respectively. Because the radius of Zn2+ and Sn4+ each is greater than that of Fe3+ the lattice parameters and the unit cell volume increased linearly with an increase of x. The co-substitution of Zn2+ and Sn4+ ions to Fe3+ in the main phase of BaFe12O19 changed the magnetic properties of the sample. Both Zn2+ and Sn4+ substituting ions reduced the magneto-crystalline anisotropy constant of the main phase from 2.3 × 106 erg/cc at x = 0.05 to 0.89 × 106 erg/cc at x = 1.0. This reduction, reduced coercivity from 16.34 kOe to 0.47 kOe. The saturation magnetization of the single-phase samples was not significantly decreased. All BaFe(12–2x) SnxZnxO19 samples were capable of absorbing the electromagnetic wave in the x-band frequency range with a single absorption peak. The best reflection loss (RL) of -28.1 dB with the largest bandwidth of 3.1 GHz was obtained in a single-phase sample with a composition of x = 0.35, having an impedance (Zin = 51.54-j3. 69 Ω) close to Zo (50 Ω).
AB - A series of single-phase samples with BaFe(12–2x) SnxZnxO19 (x = 0.05, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.5, 0.7, and 1.0) compositions were successfully fabricated using a mechanical alloying technique. The ionic positions Zn2+ and Sn4+ occupy the same site as the Fe3+ions occupying tetrahedral and octahedral sites, respectively. Because the radius of Zn2+ and Sn4+ each is greater than that of Fe3+ the lattice parameters and the unit cell volume increased linearly with an increase of x. The co-substitution of Zn2+ and Sn4+ ions to Fe3+ in the main phase of BaFe12O19 changed the magnetic properties of the sample. Both Zn2+ and Sn4+ substituting ions reduced the magneto-crystalline anisotropy constant of the main phase from 2.3 × 106 erg/cc at x = 0.05 to 0.89 × 106 erg/cc at x = 1.0. This reduction, reduced coercivity from 16.34 kOe to 0.47 kOe. The saturation magnetization of the single-phase samples was not significantly decreased. All BaFe(12–2x) SnxZnxO19 samples were capable of absorbing the electromagnetic wave in the x-band frequency range with a single absorption peak. The best reflection loss (RL) of -28.1 dB with the largest bandwidth of 3.1 GHz was obtained in a single-phase sample with a composition of x = 0.35, having an impedance (Zin = 51.54-j3. 69 Ω) close to Zo (50 Ω).
KW - coercivity
KW - Mechanical alloying
KW - microwave absorption
KW - reflection loss
KW - saturation magnetization
UR - http://www.scopus.com/inward/record.url?scp=85130602224&partnerID=8YFLogxK
U2 - 10.1016/j.mtla.2022.101455
DO - 10.1016/j.mtla.2022.101455
M3 - Article
AN - SCOPUS:85130602224
SN - 2589-1529
VL - 23
JO - Materialia
JF - Materialia
M1 - 101455
ER -