La0.7Ca0.3MnO3-δ:Ag nanocomposite thin films with large temperature coefficient of resistance (TCR)

Fei Jin; Duojie Wu; Yani Lu; Zizhao Pan; Meng Gu; Hong Wang

Journal of Materiomics (Jul 2022)

La0.7Ca0.3MnO3-δ:Ag nanocomposite thin films with large temperature coefficient of resistance (TCR)

Fei Jin,
Duojie Wu,
Yani Lu,
Zizhao Pan,
Meng Gu,
Hong Wang

Affiliations

Fei Jin: State Key Laboratory for Mechanical Behavior of Materials, School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an, 710049, China; Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, China; Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, Yunnan, China
Duojie Wu: Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, China
Yani Lu: Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, China; Shenzhen Engineering Research Center for Novel Electronic Information Materials and Devices & Guangdong Provincial Key Laboratory of Functional Oxide Materials and Devices, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, China
Zizhao Pan: Shenzhen Engineering Research Center for Novel Electronic Information Materials and Devices & Guangdong Provincial Key Laboratory of Functional Oxide Materials and Devices, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, China
Meng Gu: Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, China
Hong Wang: State Key Laboratory for Mechanical Behavior of Materials, School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an, 710049, China; Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, China; Shenzhen Engineering Research Center for Novel Electronic Information Materials and Devices & Guangdong Provincial Key Laboratory of Functional Oxide Materials and Devices, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, China; Corresponding author. State Key Laboratory for Mechanical Behavior of Materials, School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an, 710049, China.

Journal volume & issue: Vol. 8, no. 4
pp. 799 – 805

Abstract

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In this work, oxygen vacancy-regulated La0.7Ca0.3MnO3-δ:Ag (LCMO:A) nanocomposite thin films on LaAlO3 (001) substrates were investigated to obtain films with large temperature coefficient of resistance (TCR) values. LCMO:A nanocomposite thin films were synthesized using pulsed laser deposition, and oxygen pressures during film deposition and annealing steps were optimized. As oxygen pressures increased, lattice parameter increased from 70 Pa to 100 Pa, Tp increased monotonically from 168 K to 282 K, and average Mn4+ concentration in the film increased as indicated by X-ray photoemission spectroscopy data. Record high TCR value of ∼37% K−1 was achieved in LCMO:A nanocomposite thin film prepared with optimal oxygen pressures, making this film promising candidate for applications in bolometers.

Published in Journal of Materiomics

ISSN: 2352-8478 (Print); 2352-8486 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.sciencedirect.com/journal/journal-of-materiomics

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