TCR and MR room-temperature enhancing mechanism of La0.7K0.3−xSrxMnO3 ceramics for uncooling infrared bolometers and magnetic sensor devices
作者： Xiang Liu , Xiaohan Yu , Kaili Chu , Hongjiang Li , Xingrui Pu
DOI: 10.1016/J.CERAMINT.2021.03.235
关键词:
摘要: During the last decades, significant improvements of both the magnetoresistance (MR) and the temperature coefficient of resistivity (TCR) of ceramics (at room temperature) have opened new opportunities to build uncooled infrared bolometers and magnetic sensor devices. Herein, polycrystalline La 0.7 K 0.3− x Sr x MnO 3 ceramics, with 0.00≤ x≤ 0.25 were prepared by a facile sol–gel method. TCR max increased from 6.4% K− 1 at 270.2 K (for x= 0.00) to 11.9% K− 1 at 291.2 K (for x= 0.05), and the low-field (1 T) MR max reached …
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