Improved magnetic and magnetoelectric properties in BaFe12O19 nanostructures. Issue 27 (3rd July 2017)

• Record Type: Journal Article
• Authors: Xu, Xingyu; Huang, Fengzhen; Shao, Ye; Zhou, Min; Ren, Xianming; Lu, Xiaomei; Zhu, Jinsong
• Is Part Of: Physical chemistry chemical physics. Volume 19:Issue 27(2017)
• Page Start: 18023
• Page End: 18029
• Publication Date: 2017-07-03
• Subjects: Chemistry, Physical and theoretical -- Periodicals; 541.3
• DOI: 10.1039/c7cp02276j
• Languages: English
• ISSNs: 1463-9076

Abstract

Abstract : Improved magnetism and magnetodielectric coupling are obtained in plate-like BaFe12 O19 nanoparticles because of their larger structural distortion. Abstract : The structural, magnetic and magnetoelectric properties were investigated for sol–gel prepared BaFe12 O19 nanorods and plate-like nanoparticles. Based on comparative experiments with bulk ceramics, it is found that larger structural distortion is present in nanostructures, which could cause the enhancement of magnetocrystalline anisotropy and the off-center displacement of Fe 3+ ions, and thus result in improved magnetic and magnetoelectric properties in BaFe12 O19 plate-like nanoparticles. Meanwhile, the local (Fe 2+ –Fe 3+ ) dipoles, which usually appear during a high temperature sintering process, can also contribute to the negative magnetoelectric effect of BaFe12 O19 nanorods and a large room temperature magnetodielectric coefficient of about −13% is observed at 10 4 Hz and 9 kOe.