当前位置: X-MOL 学术Ceram. Int. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Tuning of Ferrimagnetic nature and Hyperfine Interaction of Ni 2+ doped Cobalt ferrite nanoparticles for Power Transformer Applications
Ceramics International ( IF 5.2 ) Pub Date : 2018-06-01 , DOI: 10.1016/j.ceramint.2018.02.129
K.M. Srinivasamurthy , Jagadeesha Angadi V , S.P. Kubrin , Shiddaling Matteppanavar , D.A. Sarychev , P. Mohan Kumar , Haileeyesus Workineh Azale , B. Rudraswamy

Abstract Ferrites may contain single domain particles which gets converted into super-paramagnetic state near critical size. To explore the existence of these characteristic feature of ferrites, we have performed magnetization(M-H loop) and Mossbauer spectroscopic studies of Ni2+ substitution effect in Co1-xNixFe2O4 (where x = 0, 0.25, 0.5, 0.75 and 1) nanoparticles were fabricated by solution combustion route using mixture of carbamide and glucose as fuels for the first time. As prepared samples exhibit spinel cubic structure with lattice parameters which decreases linearly with increase in Ni2+ concentration. The M-H loops reveals that saturation magnetization(Ms), coercive field(Hc) remanence magnetization(Mr) and magnetron number(ηB) decreases significantly with increasing Ni2+ substitution. The variation of saturation magnetization has been explained on the basis of Neel's molecular field theory. The coercive field(Hc) is found strongly dependent on the concentration of Ni2+ and decrease of coercivity suggests that the particles have single domain and exhibits superparamagnetic behavior. The Mossbauer spectroscopy shows two ferrimagnetically relaxed Zeeman sextets distribution at room temperature. The dependence of Mossbauer parameters such as isomer shift, quadru pole splitting, line width and hyperfine magnetic field on Ni2+ concentration have been discussed. Hence our results suggest that synthesized materials are potential candidate for power transformer application.

中文翻译:

用于电力变压器应用的 Ni 2+ 掺杂钴铁氧体纳米粒子的亚铁磁性质和超精细相互作用的调整

摘要 铁氧体可能包含单畴粒子,这些粒子会在临界尺寸附近转化为超顺磁性状态。为了探索铁氧体这些特征的存在,我们对 Co1-xNixFe2O4(其中 x = 0、0.25、0.5、0.75 和 1)中的 Ni2+ 替代效应进行了磁化(MH 环)和 Mossbauer 光谱研究,通过溶液制备纳米颗粒首次采用尿素和葡萄糖的混合物作为燃料的燃烧路线。由于制备的样品表现出尖晶石立方结构,其晶格参数随着 Ni2+ 浓度的增加而线性下降。MH 回路表明饱和磁化强度(Ms)、矫顽磁场(Hc)、剩磁磁化强度(Mr) 和磁控管数(ηB)随着Ni2+取代度的增加而显着降低。饱和磁化强度的变化已经根据尼尔的分子场理论进行了解释。发现矫顽力 (Hc) 强烈依赖于 Ni2+ 的浓度,矫顽力的降低表明颗粒具有单畴并表现出超顺磁性。穆斯堡尔光谱显示了室温下两个亚铁磁弛豫塞曼六重峰分布。已经讨论了诸如异构体位移、四极分裂、线宽和超精细磁场等穆斯堡尔参数对 Ni2+ 浓度的依赖性。因此,我们的结果表明合成材料是电力变压器应用的潜在候选者。发现矫顽力 (Hc) 强烈依赖于 Ni2+ 的浓度,矫顽力的降低表明粒子具有单畴并表现出超顺磁性。穆斯堡尔光谱显示了室温下两个亚铁磁弛豫塞曼六重峰分布。已经讨论了诸如异构体位移、四极分裂、线宽和超精细磁场等穆斯堡尔参数对 Ni2+ 浓度的依赖性。因此,我们的结果表明合成材料是电力变压器应用的潜在候选者。发现矫顽力 (Hc) 强烈依赖于 Ni2+ 的浓度,矫顽力的降低表明颗粒具有单畴并表现出超顺磁性。穆斯堡尔光谱显示了室温下两个亚铁磁弛豫塞曼六重峰分布。已经讨论了诸如异构体位移、四极分裂、线宽和超精细磁场等穆斯堡尔参数对 Ni2+ 浓度的依赖性。因此,我们的结果表明合成材料是电力变压器应用的潜在候选者。讨论了四极分裂、线宽和超精细磁场对 Ni2+ 浓度的影响。因此,我们的结果表明合成材料是电力变压器应用的潜在候选材料。讨论了四极分裂、线宽和超精细磁场对 Ni2+ 浓度的影响。因此,我们的结果表明合成材料是电力变压器应用的潜在候选者。
更新日期:2018-06-01
down
wechat
bug