The role of Fe dopants in phase stability and electric switching properties of Fe-doped VO2. Issue 16 (December 2016)

• Record Type: Journal Article
• Authors: Zhang, Ruibo; Jin, Hai-Bo; Guo, Deyu; Zhang, Jiasong; Zhao, Zhengjing; Zhao, Yongjie; Li, Jing-Bo
• Is Part Of: Ceramics international. Volume 42:Issue 16(2016)
• Page Start: 18764
• Page End: 18770
• Publication Date: 2016-12
• Subjects: VO2 -- Iron doping -- Metal-insulator transition -- Electric switching properties; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2016.09.017
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: The effect of Fe dopants on the metal-insulator transition of VO2 is investigated by X-ray diffraction, Raman spectroscopy and thermal resistance measurements. The transition temperature is observed to decrease first, reach its minima (~60 °C) at ~1.5 at% Fe and then rise with increasing the doping concentration. The M 2 and T phases are determined to be stabilized by the Fe dopants. The stability regions of polymorphic phases of Fe-doped VO2 are examined by Raman spectroscopy and X-ray diffraction. The solubility of Fe in VO2 is determined to be ~4 at%. A phase diagram of Fe-doped VO2 is constructed based on the experimental results. The resistance change of samples with the Fe content less than 1.5 at% remains to be ~4 orders of magnitude, demonstrating Fe-doped VO2 a promising electric switching material.