Synthesis and magnetic characterization of Cd-doped CoCr2O4 ceramics for low-temperature applications

IF 5.1 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International Pub Date : 2025-03-01 DOI:10.1016/j.ceramint.2024.12.390

Huajing Gao , Jagadeesha Angadi V. , Shifa Wang , Kiran Bhaskar , Dengfeng Li , Xianju Zhou , Li Li , Hua Yang , Sheng Yun Wu , Mohd Ubaidullah , Chander Prakash , Ashok Kumar , Nagaraj Basavegowda , S.O. Manjunatha , Manjunatha K , Li Zhengyou , Kamaludin Abdulvakhidov

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引用次数: 0

Abstract

The Co_1-xCd_xCr₂O₄ (x = 0–0.15) magnetic nanoparticles were synthesized by a simple solution combustion method using glucose and urea as fuel. When Cd²⁺ ions are introduced into CoCr₂O₄, the phase structure of CoCr₂O₄ is not changed, but the lattice parameter first increases and then decreases with the increasing of Cd ion concentration, and the crystallite size decreases with the increasing of Cd ion concentration. Because a large number of Cd ions may change the energy state of the grain boundary, promote the abnormal growth of the grain, and thus lead to the increase of the crystallite size, the abnormal phenomenon occurs when the doping amount reaches x = 0.12. The microstructure characterization confirms that the particle size of Co_1-xCd_xCr₂O₄ decreased with the increasing of Cd ion concentration, and the agglomeration between the particles was obvious. Magnetic characterization indicates that the magnetic transition temperature, residual magnetization, and squareness ratio of Co_1-xCd_xCr₂O₄ (x = 0.03) are larger than those of other samples. After the Cd ion concentration is increased further, the anti-ferromagnetic coupling is enhanced due to ion doping, which leads to a decrease in the average particle size and lattice parameter of Co_1-xCd_xCr₂O₄, a decrease in the number of magnetic domains and domain walls contained in each particle, and a corresponding decrease in the movement of magnetic domain walls during magnetization, resulting in a larger energy required for magnetic domain rotation, which leads to a decrease in the magnetic properties of Co_1-xCd_xCr₂O₄.

The main goal of the study mentioned in the introduction of the document is to synthesize Cd-doped CoCr₂O₄ (Co_1-xCd_xCr₂O₄) magnetic nanoparticles using a solution combustion method and systematically investigate the effects of Cd ion doping on the phase structure, microstructure, and magnetic properties of the material. The research aims to understand how varying Cd ion concentrations influence lattice parameters, crystallite size, and magnetic characteristics, with the ultimate objective of optimizing the material's magnetic properties for potential applications in magnetic storage media, transformers, inductors, and other magnetic devices.

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来源期刊

Ceramics International 工程技术-材料科学：硅酸盐

CiteScore

9.40

自引率

15.40%

发文量

4558

审稿时长

25 days

期刊介绍： Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties. Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour. Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.