期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 895, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2021.162627
关键词
Mixed spinel ferrite; Microwave processing; Cation distribution; Tunable magnetic properties; Magneto-mechanical properties
资金
- National Research Foundation of Korea [NRF-2020R1A2C1015206, NRF-2019M3F5A1A01077146, NRF-2021M3H4A1A02051331]
An ultrafast, eco-friendly, and thermally efficient microwave (MW)-heating technique is proposed to replace conventional methods for preparing Ni-doped CoFe2O4 ferrite nanoparticles, resulting in cubic spinel ferrite structures with composition-dependent tunable magnetic properties. Ni-substituted CoFe2O4 demonstrates remarkable magnetostrictive behavior suitable for magnetoelectric composites and magneto-mechanical sensor applications, highlighting the potential of efficient, fast, and eco-friendly microwave processing for future electromagnetic device applications.
The preparation of nanomaterials by conventional methods involves multiple steps that are time-and energy-consuming; hence, it must be replaced by clean, environment-friendly processes. Nanostructured mixed spinel ferrites have wide applicability given their electrical, magnetic, and magnetostrictive properties. Herein, we present an ultrafast, eco-friendly, and thermally efficient microwave (MW)-heating technique to replace the conventional strategies for the preparation of Ni-doped CoFe2O4 ferrite nano particles. Mixed spinel ferrite nanoparticles are obtained through an MW technique carried out for 20 min at 600 degrees C. The cubic nature of the MW-processed, Ni-substituted CoFe2O4 spinel ferrite is demonstrated by Rietveld refinement. Composition-dependent tunable magnetic properties associated with cation distribution and average crystallite size variation are realized by the substitution of Ni2+ at Co2+ in the CoFe2O4 lattice. The highest values of saturation magnetization and coercivity are noted for the Co0.9Ni0.1Fe2O4 ferrite at 5 K and the average crystallite size is similar to 20 nm; the octa to tetra transition of Co2+ is observed owing to substitution by Ni2+ ions. The highest values of magnetostrictive coefficient and strain sensitivity are detected for CoFe2O4; the Ni2+-substituted Co0.9Ni0.1Fe2O4 also exhibits nearly identical behavior. Thus, Ni2+-substituted CoFe2O4 is a remarkable magnetostrictive material suitable for developing magnetoelectric composites and magneto-mechanical sensor applications. Moreover, it is observed that efficient, fast, and eco-friendly microwave processing can be adopted as an alternative approach for low-temperature processing such kinds of nanostructured materials for future electromagnetic device applications. (C) 2021 Elsevier B.V. All rights reserved.
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