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Selective microwave absorption in Nd3+ substituted barium ferrite composites

Widanarto, Wahyu and Siti Khaeriyah, Siti Khaeriyah and Ghoshal, Sib Krishna and Kurniawan, Candra and Effendi, Mukhtar and Cahyanto, Wahyu Tri (2019) Selective microwave absorption in Nd3+ substituted barium ferrite composites. Journal of Rare Earths, 37 (12). pp. 1320-1325. ISSN 1002-0721

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Official URL: http://dx.doi.org/10.1016/j.jre.2019.01.008


Microwave (MW) frequency based wireless communications and electronic devices became prospective due to several ramifications. To meet this need, a series of neodymium ions (Nd3+) substituted barium ferrite composites with composition (20)BaO:(80–x)Fe2O3:(x)Nd2O3 (0 ≤ x ≤ 3 mol%) was prepared at 1100 °C using solid-state reaction method. We evaluated the effect of various Nd3+ ions contents on the surface morphology, structure, and magnetic properties of the as-synthesized barium ferrite composites. Meanwhile, microwave reflection loss, complex permittivity and permeability were determined using the transmission/reflection line method in the X-band (8–12 GHz). SEM image of the composites shows that the surface morphology consists of rough and porous microstructures. XRD patterns of the un-doped composites reveal the existence of BaFe12O19 (hexagonal) and Fe21.333O32 (tetragonal) crystalline phases. Furthermore, a new hexagonal crystalline phase of Ba6Nd2Fe4O15 with the crystallite sizes between 15 and 67 nm is observed due to Nd3+ ions substitution in the composite. The saturation magnetization of the composite containing 2 mol% of Nd3+ does not exhibit any significant alteration compared to the one devoid of Nd3+. The complex relative permitivity and permeability of the achieved composites enriched in Ba6Nd2Fe4O15 and BaFe2O4 phases disclose significant MW frequency dependence. The composites also display selective MW absorption in the X-band which could be useful for diverse applications.

Item Type:Article
Uncontrolled Keywords:Magnetic properties, Rare earths
Subjects:Q Science > QC Physics
ID Code:89574
Deposited By: Widya Wahid
Deposited On:22 Feb 2021 10:20
Last Modified:22 Feb 2021 10:20

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