通过掺杂镍调整纳米 Er2O3 的磁性、结构和屏蔽特性

IF 1.8 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

ECS Journal of Solid State Science and Technology Pub Date : 2024-08-30 DOI:10.1149/2162-8777/ad71f1

Zein K. Heiba, Mohamed Bakr Mohamed, Ali Badawi

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引用次数: 0

摘要

我们研究了掺镍量对纳米 Er2O3 的结构、磁性和屏蔽性能的影响。纳米 Er2-xNixO3（x = 0、0.05、0.1、0.15）样品是通过一种 pechini 方案制备的，并通过 X 射线衍射进行了表征。利用里特维尔德细化法发现了阳离子在两个晶体学位点上的分布。此外，还研究了阳离子在结构的两个非等价位点上的排序以及八面体氧键长度随成分 x 的变化。随着 x 的增加，(Er/Ni)O6 八面体在 8b 和 24d 附近的平均键长持续减少。随着掺杂镍量的增加，平均晶粒尺寸减小，而平均晶格微应变增加。研究了 200 Oe 磁场下所有样品的磁化与温度之间的相关性。应用居里-魏斯定律找到了磁矩和磁结构类型。当镍掺杂水平从 0 上升到 0.15 时，Er2-xNixO3 样品中的μeff 从 9.7 μB 下降到 9.36 μB。当 Er2-xNixO3 样品中的镍掺杂水平从 x = 0 变为 x = 0.15 时，计算出的磁矩 μcal 从 9.4 μB 下降到 9.02 μB。所有样品的居里顺磁温度（θ）都从-10.6 上升到-19.34。通过 Phy-X/PSD 软件获得了纳米 Er2-xNixO3 样品的伽马射线理论衰减参数。纳米 Er2-xNixO3 样品已被证明具有显著的磁屏蔽和中子屏蔽功能。

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Tailoring the Magnetic, Structural and Shielding Characteristics of Nano Er2O3 via Ni Doping

We investigated the effects of Ni-doping amount on the structural, magnetic, and shielding properties of nano Er₂O₃. Nano Er_2−xNi_xO₃ (x = 0, 0.05, 0.1, 0.15) samples were fabricated by a pechini scheme and characterized via X-ray diffraction. Rietveld refinement was used to discover the distribution of cations on the two crystallographic sites. Cation ordering in the two nonequivalent sites of the structure and the variation of the oxygen bond lengths of octahedra with the composition x were also investigated. A consistent reduction in the average bond lengths of (Er/Ni)O₆ octahedra around 8b and 24d as x progresses was observed. Average crystallite size reduced while average lattice micro-strain increased with increasing Ni doping. The correlation between magnetization and temperature for all samples under a magnetic field of 200 Oe was studied. Curie-Weiss law was applied to find the magnetic moments and the types of magnetic structure. The μ _eff in the Er_2−xNi_xO₃ samples dropped from 9.7 to 9.36 μ_B as the nickel doping level rose from 0 to 0.15. Calculated magnetic moments, μ _cal, were found to drop from 9.4 to 9.02 μ_B as the nickel doping level changed from x = 0 to x = 0.15 in Er_2−xNi_xO₃ samples. Curie paramagnetic temperature (θ) for all samples has been observed to rise from −10.6 to −19.34. The theoretical gamma-ray attenuation parameters for nano Er_2−xNi_xO₃ samples were acquired through the Phy-X/PSD software. The nano Er_2−xNi_xO₃ samples have been proven to possess remarkable magnetic and neutron shielding applications.

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来源期刊

ECS Journal of Solid State Science and Technology MATERIALS SCIENCE, MULTIDISCIPLINARY-PHYSICS, APPLIED

CiteScore

4.50

自引率

13.60%

发文量

455

期刊介绍： The ECS Journal of Solid State Science and Technology (JSS) was launched in 2012, and publishes outstanding research covering fundamental and applied areas of solid state science and technology, including experimental and theoretical aspects of the chemistry and physics of materials and devices. JSS has five topical interest areas: carbon nanostructures and devices dielectric science and materials electronic materials and processing electronic and photonic devices and systems luminescence and display materials, devices and processing.