Polymerized Complex Synthesis and Effect of Ti Dopant on Magnetic Properties of LaFeO3 Nanoparticles
Polymerized Complex Synthesis and Effect of Ti Dopant on Magnetic Properties of LaFeO3 Nanoparticles
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DOI：
10.1166/jnn.2015.11407
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发表时间：
2015-11-01
影响因子：
--
通讯作者：
Maensiri, Santi
中科院分区：
文献类型：
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作者：
Phokha, Sumalin;Pinitsoontorn, Supree;Maensiri, Santi
研究了聚合络合法合成的Ti掺杂LaFeO 3（LaFe 1-xTixO 3，X = 0、0.1、0.2、0.3、0.4和0.5）纳米颗粒的结构、表征和磁性能。所有的LaFe 1-xTixO 3纳米颗粒都是通过在空气中1050 ℃煅烧2 h成功获得的。采用X射线衍射（XRD）、透射电子显微镜（TEM）、能量色散X射线分析（EDX）、X射线光电子能谱（XPS）、X射线吸收近边谱（XANES）和振动样品磁强计（VSM）对样品进行了表征。XRD和TEM结果表明，样品均为单相正交结构。XPS和XANES结果证实，Fe离子的价态混合在Fe 3+和Fe 4+状态，Ti离子的价态混合在Ti 4+状态。当x = 0.4时，在10 kOe下获得了最高磁化强度（M）为0.23 emu/g的弱铁磁行为。所有LaFe_（1-x）Ti_xO_3样品的铁磁性（FM）起源支持Fe ~（3+）和Fe ~（4+）离子通过双交换（DE）相互作用的磁耦合。
Structure, characterization, and magnetic properties of Ti-doped LaFeO3 (LaFe1-xTixO3, X = 0, 0.1, 0.2, 0.3, 0.4 and 0.5) nanoparticles synthesized by polymerized complex method are investigated. All LaFe1-xTixO3 nanoparticles were successfully obtained from calcination of the precursor at 1050 degrees C in air for 2 h. The calcined LaFe1-xTixO3 samples were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), energy dispersive X-ray analysis (EDX), X-ray photoelectron spectroscopy (XPS), X-ray absorption near edge spectroscopy (XANES) and vibrating sample magnetonnetry (VSM). The XRD and TEM results showed that all LaFe1-xTixO3 samples had a single phase nature with the orthorhombic structure. The valence states were mixed in the Fe3+ and Fe4+ state for Fe ions and Ti4+ state for Ti ions, as confirmed by XPS and XANES results. The weak ferromagnetic behavior with the highest magnetization (M) of similar to 0.23 emu/g at 10 kOe was obtained for x = 0.4. The origin of the ferromagnetism (FM) for all LaFe1-xTixO3 samples supports the magnetic coupling between Fe3+ and Fe4+ ions via double exchange (DE) interaction.