Effect of Co concentration on cation distribution and magnetic and magneto-optical properties of CoxZn1-xFe2O4 nanoparticles synthesized with citrate precursor method

IF 2.7 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Research Pub Date : 2024-09-16 DOI:10.1557/s43578-024-01442-1

Atul Thakur, Irina Edelman, Dmitriy Petrov, Sergey Ovchinnikov, Preeti Thakur, Sergey Zharkov, Yuri Knyazev, Alexander Sukhachev

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Abstract

Magnetic properties of mixed spinel ferrites are determined, in great extent, by the magnetic cation distribution among tetrahedral and octahedral positions in a crystal. In the case of CoZn-ferrites, most researchers reported a predominant localization of the divalent cobalt ions in octahedral positions. Using the citrate precursor auto-combustion method, we successfully synthesized Co_xZn_1-xFe₂O₄ nanoparticles (x changed from 0.0 to 0.5) with an approximately evenly distribution of Co²⁺ ions between these interstitial positions. Fe³⁺ ions are localized preferably in octahedral positions. This type of 3d-ion distribution predetermined the combination of the large saturation magnetization and very low coercive field of the nanoparticles, which may be of importance for applications. MCD spectra of Co_xZn_1-xFe₂O₄ nanoparticles are studied here for the first time. Revealed intense MCD peak at 1.75 eV corresponds to the emission wavelength (710 nm) of some lasers, e.g., ALP-710 nm (NKT Photonics, Denmark) which may be of interest for photonic devices.

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钴浓度对柠檬酸盐前驱体法合成的 CoxZn1-xFe2O4 纳米粒子阳离子分布及磁性和磁光特性的影响

混合尖晶石铁氧体的磁性能在很大程度上取决于晶体中磁性阳离子在四面体和八面体位置上的分布。就 CoZn 铁氧体而言，大多数研究人员报告称二价钴离子主要分布在八面体位置。我们采用柠檬酸盐前驱体自动燃烧法成功合成了 CoxZn1-xFe2O4 纳米粒子（x 值从 0.0 变为 0.5），Co2+ 离子大致均匀地分布在这些间隙位置。Fe3+离子主要分布在八面体位置。这种 3d 离子分布类型预先决定了纳米粒子的大饱和磁化和极低矫顽力场的结合，这可能对应用非常重要。本文首次研究了 CoxZn1-xFe2O4 纳米粒子的 MCD 光谱。在 1.75 eV 处显示的强烈 MCD 峰与一些激光器的发射波长（710 nm）相对应，例如 ALP-710 nm（丹麦 NKT Photonics 公司），这可能对光子设备很有意义。

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来源期刊

Journal of Materials Research 工程技术-材料科学：综合

CiteScore

4.50

自引率

3.70%

发文量

362

审稿时长

2.8 months

期刊介绍： Journal of Materials Research (JMR) publishes the latest advances about the creation of new materials and materials with novel functionalities, fundamental understanding of processes that control the response of materials, and development of materials with significant performance improvements relative to state of the art materials. JMR welcomes papers that highlight novel processing techniques, the application and development of new analytical tools, and interpretation of fundamental materials science to achieve enhanced materials properties and uses. Materials research papers in the following topical areas are welcome. • Novel materials discovery • Electronic, photonic and magnetic materials • Energy Conversion and storage materials • New thermal and structural materials • Soft materials • Biomaterials and related topics • Nanoscale science and technology • Advances in materials characterization methods and techniques • Computational materials science, modeling and theory