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Studying near room-temperature magnetoresistance of A-site Sr-doped into La0.67Ca0.33Mn0.98Fe0.02O3: Ag0.15 ceramics

  • Original Paper: Sol-gel and hybrid materials for dielectric, electronic, magnetic and ferroelectric applications
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Abstract

Perovskite La1-xCaxMnO3 (LCMO) has attracted extensive attention due to its high-temperature coefficient of resistivity (TCR) and large magnetoresistance (MR), which can be used in infrared measurements, magnetic refrigeration, magnetic storage and other applications. Doping Fe on the b-site of LCMO can provide larger TCR and MR. The La0.67Ca0.33Mn0.98Fe0.02O3: Ag0.15 (LCMFO: Ag) obtained by compounding with Ag showed that these properties were further improved. However, the temperature points at which peak TCR and peak MR occur for LCMO are not practical for applications. Sr doping at the a-site of LCMO is an effective means to control the insulation-metal transition temperature of the system. In this study, the temperature corresponding to the peak TCR and peak MR shifted to room temperature by Sr doping at the a-site of LCMFO: Ag to create La0.67Ca0.33-xSrxMn0.98Fe0.02O3: Ag0.15 (x = 0–0.09) ceramics. For x = 0.09, the peak TCR reached 10.8%·K−1 at 280.1 K and the peak MR reached 41.7% at 282.5 K. These results are beneficial to enhancing the application potential of LCMO-based systems.

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Funding

This work was supported by the National Natural Science Foundation of China (No. 11564021).

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Authors and Affiliations

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

    Ruiting Hou, Haishan Wang, Xiangxiang Zhu, Qingming Chen, Hui Zhang & Yule Li

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  1. Ruiting Hou
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  2. Haishan Wang
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  3. Xiangxiang Zhu
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  5. Hui Zhang
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  6. Yule Li
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Correspondence to Yule Li.

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Hou, R., Wang, H., Zhu, X. et al. Studying near room-temperature magnetoresistance of A-site Sr-doped into La0.67Ca0.33Mn0.98Fe0.02O3: Ag0.15 ceramics. J Sol-Gel Sci Technol 107, 474–482 (2023). https://doi.org/10.1007/s10971-023-06134-6

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  • DOI: https://doi.org/10.1007/s10971-023-06134-6

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