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Optimized TCR and MR of La 0.67 Ca 0.33- x Sr x MnO 3 : Ag 0.15 ceramics by Sr doping
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| 【文章作者】Hou, Ruiting;Wang, Shaozheng;Tian, Lanlan;Zhang, Hui;Chen, Qingming;Li, Yule |
| 【文章摘要】 Herein, in order to successfully create high-density La0.67Ca0.33-xSrxMnO3: Ag-0.15 (LCSMO: Ag) ceramics (0 <= x <= 0.05), this research combines sol-gel and solid-phase processes. LCSMO: Ag ceramics electrical transport and magnetic properties were thoroughly investigated. XRD verified that the high-purity orthorhombic perovskite structure (space group Pnma) was produced. As Sr doping rises, the grain size grows, the single electron bandwidth increases, the metal-insulator transition temperature (T-MI) continues to climb, and temperature coefficient of resistance (TCR) and magnetoresistance (MR) steadily drop. When x = 0.04, the T-MI reaches 302.2 K. At this time, the TCR peak (TCRpeak) reaches 24.0 %K-1 and the MRpeak reaches 49.2 %. These results demonstrate that Sr may effectively raise the T-MI of LCMO: Ag ceramics to room temperature while maintaining high TCR and MR Values, which benefits the material's potential applications in devices such as uncooled infrared detectors. |
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【卷】【ISSUE】【ISSUEID】
【文章期份】2024
【发布日期】2025/5/13 10:04:17
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