We have developed a thin film structure with a maximum magnetoresistance effect (MRE) at room temperature, which is one of the operating requirements for many applications. It is shown that La0.67Ba0.33Ti0.02Mn0.98O3 epilayers obtained by pulsed laser deposition onto (001) SrTiO3 single crystal substrates exhibit the highest MRE, ΔR/R(H)≈150% or ΔR/R(0)≈60% under 5 T, at 300 K, a temperature near to the corresponding Curie temperature (TC). Both doping with a tiny amount of titanium and induced stress due to lattice mismatch between the thin film and the substrate contribute to a decrease in TC as compared to the pristine compound and therefore to the decrease in the temperature where the highest MRE is recorded.

中文翻译：

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STO 001衬底上钛掺杂镧钡锰矿外延层的结构、转变温度和磁阻

我们开发了一种在室温下具有最大磁阻效应 (MRE) 的薄膜结构，这是许多应用的操作要求之一。结果表明，通过脉冲激光沉积在 (001) SrTiO3 单晶衬底上获得的 La0.67Ba0.33Ti0.02Mn0.98O3 外延层表现出最高的 MRE，ΔR/R(H)≈150% 或 ΔR/R(0)≈60 % 低于 5 T，在 300 K，温度接近相应的居里温度 (TC)。与原始化合物相比，由于薄膜和衬底之间的晶格失配而掺杂少量钛和诱发应力都有助于降低 TC，因此有助于降低记录最高 MRE 的温度。