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氧非正分La_(0.9)Ba_(0.1)MnO_(3-δ)/SrTiO_3:Nbp-n异质结的整流特性研究 被引量:2

The study on the rectifying properties of oxygen non-stoichiometric La_(0.9)Ba_(0.1)MnO_(3-δ)/SrTiO_3:Nb p-n heterojunction
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摘要 利用脉冲激光沉积技术在掺Nb的SrTiO3衬底上制备了氧非正分La0.9Ba0.1MnO3-δ/SrTiO3:Nbp-n异质结.在20—300K这一较宽的温度范围内获得了光滑的整流曲线.整流实验表明:该p-n异质结的正向扩散电压VD随着温度升高在薄膜金属—绝缘转变温度附近出现极大值,表现出与氧正分La0.9Ba0.1MnO3/SrTiO3:Nbp-n结截然不同的温度特性.结合薄膜的电阻-温度实验和能带计算结果,对这一奇异的现象进行了解释. The La0.9Ba0.1MnO3-σ/SrTiO3:Nbp-n heterojunctions have been fabricated by growing the oxygen nonstoichiometricLa0.9Ba0.1MnO3-σ thin film on the Nb doped SrTiO3 substrate with pulsed laser deposition. The good rectifying curves have been demonstrated in the temperature range of 20-300 K. The diffusion voltage VD exhibits a maximum near the transition temperature of La0.9Ba0.1MnO3-σ thin film, which is different to the observation in the oxygen stoichiometric La0.9Ba0.1MnO3-σ/SrTiO3:Nbp-n heterojunction. The interesting phenomenon has been well explained with the resistance-temperature experiment of La0.9Ba0.1MnO3-σ thin film and energy band calculations.
出处 《物理学报》 SCIE EI CAS CSCD 北大核心 2008年第1期502-507,共6页 Acta Physica Sinica
基金 国家重点基础研究发展规划项目(批准号:2004CB619004) 国家自然科学基金(批准号:60567001) 云南大学“学术骨干”培养基金资助的课题~~
关键词 La0.9Ba0.1MnO3-σ薄膜 锰氧化物p-n结 整流性质 La0.9Ba0.1MnO3-σ thin films, manganite p-n junction, rectifying properties
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