Enhanced magnetic and bolometric sensitivity of La0.7Ce0.3MnO3 thin films due to 200 MeV Ag ion irradiation
Enhanced magnetic and bolometric sensitivity of La0.7Ce0.3MnO3 thin films due to 200 MeV Ag ion irradiation
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200 MeV Ag 离子辐照增强 La0.7Ce0.3MnO3 薄膜的磁和辐射热灵敏度
DOI：
10.1063/1.1941479
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
S. Malik
中科院分区：
文献类型：
--
作者：
R. Choudhary;Ravi Kumar;S. Patil;S. Husain;J. Srivastava;S. Malik
研究了La0.7Ce0.3MnO3脉冲激光沉积薄膜的辐射热性能参数[电阻温度系数(TCR)和噪声值]和磁灵敏度及其对200 MeV Ag离子辐照的依赖性。据观察，通过控制辐照注量值，可以在不同温度范围内调节 TCR 值和磁灵敏度。结果表明，注量值为 5×1010ions∕cm2 的辐照使 TCR 值向正方向变化，增强了室温下的磁灵敏度，而注量值为 1×1012ions∕cm2 的辐照则增强了 200 K 下的这些参数。这些观察结果是根据 200 MeV Ag 离子辐照引起的结构和电输运变化来解释的。
The parameters for bolometric performance [temperature coefficient of resistance (TCR) and noise value] and magnetic sensitivity of pulsed-laser-deposited thin films of La0.7Ce0.3MnO3 and their dependence on the 200 MeV Ag ions irradiation are studied. It is observed that the TCR value and magnetic sensitivity can be tuned in different temperature regime by controlling the irradiation fluence value. It turns out that irradiation with a fluence value of 5×1010ions∕cm2 changes the TCR value in a positive direction and enhances magnetic sensitivity at room temperature, while irradiation with a fluence value of 1×1012ions∕cm2 enhances these parameters at 200 K. The observations are explained on the basis of structural and electrical transport modifications induced by the 200 MeV Ag ion irradiation.