La_(0.7)Ca_(0.3)MnO_(3-δ):Ag nanocomposite thin films with large temperature coefficient of resistance(TCR)  

作　　者：Fei Jin Duojie Wu Yani Lu Zizhao Pan Meng Gu Hong Wang 

机构地区：[1]State Key Laboratory for Mechanical Behavior of Materials,School of Electronic and Information Engineering,Xi'an Jiaotong University,Xi'an,710049,China [2]Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,Guangdong,China [3]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 [4]Faculty of Materials Science and Engineering,Kunming University of Science and Technology,Kunming,650093,Yunnan,China

出　　处：《Journal of Materiomics》2022年第4期799-805,共7页无机材料学学报（英文）

基　　金：The work is supported by Key Area Research Plan of Guangdong(No.2020B010176001);Shenzhen Science and Technology Program(Nos.KQTD20180411143514543 and JCYJ20180504165831308);Shenzhen DRC project[2018]1433.

摘　　要：In this work, oxygen vacancy-regulated La_(0.7)Ca_(0.3)MnO_(3-δ):Ag (LCMO:A) nanocomposite thin films onLaAlO_(3) (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, andoxygen pressures during film deposition and annealing steps were optimized. As oxygen pressuresincreased, lattice parameter increased from 70 Pa to 100 Pa, Tp increased monotonically from 168 K to282 K, and average Mn^(4+) concentration in the film increased as indicated by X-ray photoemissionspectroscopy data. Record high TCR value of ~37% K^(-1) was achieved in LCMO:A nanocomposite thin filmprepared with optimal oxygen pressures, making this film promising candidate for applications inbolometers.

关 键 词：La_(0.7)Ca_(0.3)MnO_(3) Metal-insulator transition temperature Oxygen vacancies Temperature coefficient of resistance 

分 类 号：TB383[一般工业技术—材料科学与工程]