Tuning room-temperature TCR of La0.7K0.3−xSrxMnO3 (0.00 ≤ x ≤ 0.3) films by K and Sr co-occupying A-site-Reference-Cited by-同舟云学术

Tuning room-temperature TCR of La_0.7K_0.3−_xSr_xMnO₃ (0.00 ≤ x ≤ 0.3) films by K and Sr co-occupying A-site

Published:2022-11-14 Issue:20 Volume:121 Page:202203
ISSN:0003-6951
Container-title:Applied Physics Letters
language:en
Short-container-title:Appl. Phys. Lett.

Author:

Guan Xiaoli¹,Li Hongjiang²,Yu Zhiyuan¹,Yu Xiaohan¹,Jin Shuaizhao¹,Gu Xin¹,Liu Xiang¹^ORCID

Affiliation:

1. School of Material Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China

2. College of Materials Science and Engineering, Sichuan University, Chengdu 610064, China

Abstract

A series of La0.7K0.3− xSr xMnO3 (0.00 ≤ x ≤ 0.3) films were fabricated on LaAlO3 substrates using a sol-gel spin-coating technique. The relationship between electrical transport properties and a microstructure was explained via the Jahn–Teller effect, a phenomenological percolation model, and a double-exchange mechanism. The results revealed the strong impact of K and Sr co-occupying A-sites on the formation of Mn3+/Mn4+ pairs, crystal structure, conductivity, surface morphology, and in-plane and out-of-plane strains. The as-fabricated La0.7K0.25Sr0.05MnO3 films showed a peak temperature coefficient of resistivity of 16.63% K−1 at 298.3 K.

Funder

National Natural Science Foundation of China

National College Students Innovation and Entrepreneurship Training Program

Publisher

AIP Publishing

Subject

Physics and Astronomy (miscellaneous)

Link

https://aip.scitation.org/doi/pdf/10.1063/5.0121475

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