Selective microwave absorption in Nd3+ substituted barium ferrite composites  

作　　者：Wahyu Widanarto Siti Khaeriyah Sib Krishna Ghoshal Candra Kurniawan Mukhtar Effendi Wahyu Tri Cahyanto 

机构地区：[1]Department of Physics,FMIPA,Universitas JenderalSoedirman,JL dr.Soepamo 61,Purwokerto,53123,Indonesia [2]Department of Physicsand Laser Centre,AMORG,Faculty of Science,Universiti Teknologi Malaysia,Johor Bahru,Skudai,81310,Malaysia [3]Research Center for Physics,Indonesian Institute of Sciences(LIPI),Puspiptek Office Area,South Tangerang,Banten,15314,Indonesia

出　　处：《Journal of Rare Earths》2019年第12期1320-1325,共6页稀土学报（英文版）

基　　金：Project supported by the PBK 2021/UN23.14/PN/2018(Indonesia);GUP/RU/KPT 18H68/17H19(UTM,Malaysia)

摘　　要：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)Fe2 O3:(x)Nd2 O3(0≤x≤3 mol%)was prepared at1100℃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 Ba6 Nd2 Fe4 O15 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 Ba6 Nd2 Fe4 O15 and BaFe2 O4 phases disclose significant MW frequency dependence.The composites also display selective MW absorption in the X-band which could be useful for diverse applications.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）Fe2 O3:（x）Nd2 O3（0≤x≤3 mol%） was prepared at1100℃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 Ba6 Nd2 Fe4 O15 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 Ba6 Nd2 Fe4 O15 and BaFe2 O4 phases disclose significant MW frequency dependence.The composites also display selective MW absorption in the X-band which could be useful for diverse applications.

关 键 词：NEODYMIUM doping BARIUM FERRITE COMPOSITES Magnetic properties Porosity MW reflection loss Rare earths 

分 类 号：TB3[一般工业技术—材料科学与工程]