Electron-lattice coupling and double exchange effects to improve TCR of La0.67-xNdxCa0.25Sr0.08MnO3 films grown on La0.3Sr0.7Al0.65Ta0.35O3 substrates

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

Ceramics International Pub Date : 2025-01-01 DOI:10.1016/j.ceramint.2024.11.300

Zihao Chen , Xiaolu Liang , Zimeng Pan , Zhenyu Wang , Yao Wang , Haitao Wang , Jiachen Wang , Jiankun Sun , Jun Ma , Xuexing Jiang , Jubo Peng , Xin Gu , Jing Zhang , Xiang Liu

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引用次数: 0

Abstract

In this study, La_0.67−xNd_xCa_0.25Sr_0.08MnO₃ (LNCSMO, x = 0.09, 0.10, 0.11, 0.12) films were prepared by sol-gel spin coating method. The results indicate that the LNCSMO film is oriented and grown on a La_0.3Sr_0.7Al_0.65Ta_0.35O₃ (LSATO) (00l) substrate. In addition, with the increase of Nd³⁺ content, the Mn-O bond length (d_Mn-O) and Mn-O-Mn bond angle (θ_Mn-O-Mn) decreases. The concentration ratio of Mn⁴⁺ increases firstly and then decreases, and resulting in an enhanced and then weakened double exchange (DE) effect. Measuring the variation of sample resistivity with temperature (ρ-T) using the standard four-probe method. As the content of Nd³⁺ increases, the metal-insulator transition temperature (T_p) gradually decreases, and the resistivity (ρ) gradually increases. The replacement of Nd³⁺ makes the peak temperature coefficient of resistivity value (TCR_max) of the material firstly increase and then decrease. At x = 0.11, the TCR_max reaches 34.28 % K⁻¹ at 254.72 K. This provides new insights into the impact of Nd doping on electrical transport properties.

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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.