Influence of Nd doping on the electrical and magnetoresistance properties of La0.7Ca0.3MnO3 ceramics

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

Ceramics International Pub Date : 2025-04-01 DOI:10.1016/j.ceramint.2025.01.011

Xuemei Deng, Jingang Guo, Shuang Ding, Yuchen Xie, Hui Zhang, Hongxi Liu, Qingming Chen, Yule Li

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Abstract

As a strongly correlated electronic material, perovskite manganese has a strong insulation-metal transition and colossal magnetoresistance, which makes the perovskite manganese oxide represented by La_1-xCa_xMnO₃(LCMO) has important application potential in magnetic memory, magnetic induction meter, infrared sensor and other fields. Achieving high temperature coefficient of resistance (TCR) and magnetoresistance (MR) is the key to realizing the potential applications of perovskite manganese ores. In this paper, a series of La_0.7-xNd_xCa_0.3MnO₃ polycrystalline ceramics were prepared by sol-gel method. The effects of Nd³⁺ doping on the surface morphology, crystal structure, electrical transport and magnetoresistive properties of the samples were investigated. The results show that Nd³⁺ doping can effectively change a series of magnetoelectric transport properties of polycrystalline ceramics, including TCR and MR. X-ray diffraction shows that the sample is pure phase and has excellent crystallinity. The scanning electron microscope (SEM) images reveal that the neodymium-doped polycrystalline ceramic samples have a high-density surface with no visible pores. When x = 0.09, the MR peak of this sample reaches as high as 82.77 %, when x = 0.12, the TCR peak of this sample reaches as high as 43.76 %⋅K⁻¹. This study contributes to a deeper understanding of the electrical transport and magnetoresistive properties of perovskite ceramics.

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Nd掺杂对La0.7Ca0.3MnO3陶瓷电阻和磁阻性能的影响

钙钛矿锰作为一种强相关电子材料，具有较强的绝缘-金属过渡和巨大的磁阻，这使得以La1-xCaxMnO3（LCMO）为代表的钙钛矿锰氧化物在磁记忆、磁感应计、红外传感器等领域具有重要的应用潜力。实现高温电阻系数（TCR）和磁电阻（MR）是实现钙钛矿锰矿潜在应用的关键。本文采用溶胶-凝胶法制备了一系列La0.7-xNdxCa0.3MnO3多晶陶瓷。研究了Nd3+掺杂对样品表面形貌、晶体结构、电输运和磁阻性能的影响。结果表明，Nd3+掺杂可以有效改变多晶陶瓷的一系列磁电输运性质，包括TCR和mr， x射线衍射表明样品为纯相，具有优异的结晶度。扫描电子显微镜（SEM）图像显示，掺钕多晶陶瓷样品具有高密度的表面，没有可见的孔隙。当x = 0.09时，该样品的MR峰高达82.77%，当x = 0.12时，该样品的TCR峰高达43.76%⋅K−1。本研究有助于对钙钛矿陶瓷的电输运和磁阻特性有更深入的了解。

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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.