姚丹,汪伟伟,童瑞雪.高分子辅助沉积法制备SmxNd1-xNiO3外延薄膜[J].稀有金属材料与工程,0,():-.[Dan Yao,Weiwei Wang,RuiXue Tong.SmxNd1?xNiO3 thin-films with tunable metal–insulator transition grown by polymer-assisted deposition[J].Rare Metal Materials and Engineering,0,():-].
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高分子辅助沉积法制备SmxNd1-xNiO3外延薄膜
投稿时间:2020-04-20  修订日期:2020-06-11
中文关键词:  镍酸盐  金属绝缘体转变  外延膜  高分子辅助沉积法
基金项目:安徽建筑大学博士启动项目(2019QDZ63)
中文摘要:
      本文采用高分子辅助沉积法制备不同钐(Sm)掺杂含量的SmxNd1-xNiO3外延薄膜(钐掺杂量分别为50%, 55%, 60%)。X射线衍射(特征θ-2θ扫描、摇摆曲线和φ-scan)和扫描电子显微镜的测试分析表明,制备的薄膜结晶性和外延性良好,与衬底的(001)取向保持一致。电阻率-温度曲线表明制备的外延薄膜均表现出金属绝缘体转变现象。随着Sm元素掺杂量的提高,金属绝缘体转变温度逐渐升高;当x=0.55时,外延薄膜的转变温度在室温附近。这些结果表明高分子辅助沉积法可以简单有效地制备这类热致变色外延薄膜。
SmxNd1?xNiO3 thin-films with tunable metal–insulator transition grown by polymer-assisted deposition
英文关键词:nickelates  temperature metal-insulator transition  epitaxial film  polymer assisted deposition
英文摘要:
      The epitaxial SmxNd1-xNiO3(x=0.5, 0.55, 0.6) thin films (001)-oriented single-crystal LaAlO3 substrates by a chemical solution deposition technique named polymer-assisted deposition (PAD) under ambient oxygen annealing. X-ray diffraction θ-2θ scan and rocking curve measurement, φ-scan and scanning electron microscopy studies revealed the good crystallinity and heteroepitaxy of these films. Temperature dependence of the resistivity indicates that all the films show a clear Mott metal-insulator transition and the transition temperature (TMI) shifts to higher temperature with increase of Sm content. Among them, the epitaxial Sm0.55Nd0.45NiO3 thin films exhibit MIT near room temperature. The successful growth of high quality SNNO films with room temperature transition by economic and facile PAD method opens the door to further practical application of nickelates..
作者单位
姚丹 安徽建筑大学数理学院 
汪伟伟 合肥国轩高科动力能源有限公司 
童瑞雪 中国科学技术大学合肥微尺度国家实验中心 
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