In this work, oxygen vacancy-regulated La_0.7Ca_0.3MnO_3-δ:Ag (LCMO:A) nanocomposite thin films on LaAlO₃ (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, and oxygen pressures during film deposition and annealing steps were optimized. As oxygen pressures increased, lattice parameter increased from 70 Pa to 100 Pa, T_p increased monotonically from 168 K to 282 K, and average Mn⁴⁺ concentration in the film increased as indicated by X-ray photoemission spectroscopy data. Record high TCR value of ∼37% K⁻¹ was achieved in LCMO:A nanocomposite thin film prepared with optimal oxygen pressures, making this film promising candidate for applications in bolometers.

_{在这项工作中，研究了在 LaAlO 3} (001) 衬底上的氧空位调节的 La _0.7 Ca _0.3 MnO _{3- δ} :Ag (LCMO:A) 纳米复合薄膜，以获得具有大电阻温度系数 (TCR) 值的薄膜。LCMO：使用脉冲激光沉积合成纳米复合薄膜，并优化薄膜沉积和退火步骤中的氧气压力。随着氧气压力的增加，晶格参数从 70 Pa 增加到 100 Pa，T _p从 168 K 单调增加到 282 K，并且薄膜中的平均 Mn ⁴⁺浓度增加，如 X 射线光电子能谱数据所示。创纪录的高 TCR 值 ∼37% K ^-1在 LCMO 中实现了：一种用最佳氧气压力制备的纳米复合薄膜，使这种薄膜有望成为辐射热计应用的候选者。