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• 1. [Article] Reversible Control of the Magnetization of Fe₃O₄ via Lithium Ions

  In this report, a reversible control of Fe₃O₄ saturated magnetization by Li ions is demonstrated. A miniature Li ion battery (LIB) was assembled using a Fe₃O₄ nanoparticle layer as the active cathode. ...

  Citation × Citation Citation Abstract Copy Title: Reversible Control of the Magnetization of Fe₃O₄ via Lithium Ions Author: Wei, Guodong, Wei, Lin, Wang, Dong, Tian, Yufeng, Chen, Yanxue, Yan, Shishen, Mei, Liangmo, Jiao, Jun Year: 2017 In this report, a reversible control of Fe₃O₄ saturated magnetization by Li ions is demonstrated. A miniature Li ion battery (LIB) was assembled using a Fe₃O₄ nanoparticle layer as the active cathode. A stable magnetism modulation is realized by a nondestructive electrochemical process in which the lithium insertion results in a valence change and partial redistribution of Fe cations in the crystal structure. The relation between the discharge voltage and the chemical phases were studied by ex situ X-ray diffraction and magnetic measurement. In a suitable discharge potential range, a reversible control of Fe₃O₄ saturated magnetization was obtained without structural damage to the magnetic electrode. The experimental results indicate by further optimizing the LIB's performance, a large reversible change in magnetization could be realized at room temperature, suggesting the potential for future practical applications. Title: Reversible Control of the Magnetization of Fe₃O₄ via Lithium Ions Author: Wei, Guodong, Wei, Lin, Wang, Dong, Tian, Yufeng, Chen, Yanxue, Yan, Shishen, Mei, Liangmo, Jiao, Jun Year: 2017 In this report, a reversible control of Fe₃O₄ saturated magnetization by Li ions is demonstrated. A miniature Li ion battery (LIB) was assembled using a Fe₃O₄ nanoparticle layer as the active cathode. A stable magnetism modulation is realized by a nondestructive electrochemical process in which the lithium insertion results in a valence change and partial redistribution of Fe cations in the crystal structure. The relation between the discharge voltage and the chemical phases were studied by ex situ X-ray diffraction and magnetic measurement. In a suitable discharge potential range, a reversible control of Fe₃O₄ saturated magnetization was obtained without structural damage to the magnetic electrode. The experimental results indicate by further optimizing the LIB's performance, a large reversible change in magnetization could be realized at room temperature, suggesting the potential for future practical applications. Close

• 2. [Article] Self-Assembled Epitaxial BaFe12O19 Nano-Island Film Grown on Al2O3 Substrate by Pulsed Laser Deposition

  M-type hexagonal barium ferrite is one of the most favorable ferrite materials, whose functional properties such as ferroelectric polarity alignment and the interaction between electron spins could be ...

  Citation × Citation Citation Abstract Copy Title: Self-Assembled Epitaxial BaFe12O19 Nano-Island Film Grown on Al2O3 Substrate by Pulsed Laser Deposition Author: Wei, Guodong, Wei, Lin, Chen, Yanxue, Yan, Shishen, Mei, Liangmo, Jiao, Jun Year: 2016 M-type hexagonal barium ferrite is one of the most favorable ferrite materials, whose functional properties such as ferroelectric polarity alignment and the interaction between electron spins could be controlled by manipulating its stoichiometry or microstructure. In this letter, BaFe12O19 films have been prepared on Al2O3 substrate by pulsed laser deposition at different temperature. AFM and SEM results show that under optimal preparation condition, the films change into self-assembled triangular shaped nano-islands with highly regulated orientation. Interesting magnetic and optical properties have been observed in these BaFe12O19 nanostructures. We believe this work may provide a unique opportunity to investigate anomalous phenomenons associated with nanostructured magnetic oxides and the growth dynamics of ferrite films. Title: Self-Assembled Epitaxial BaFe12O19 Nano-Island Film Grown on Al2O3 Substrate by Pulsed Laser Deposition Author: Wei, Guodong, Wei, Lin, Chen, Yanxue, Yan, Shishen, Mei, Liangmo, Jiao, Jun Year: 2016 M-type hexagonal barium ferrite is one of the most favorable ferrite materials, whose functional properties such as ferroelectric polarity alignment and the interaction between electron spins could be controlled by manipulating its stoichiometry or microstructure. In this letter, BaFe12O19 films have been prepared on Al2O3 substrate by pulsed laser deposition at different temperature. AFM and SEM results show that under optimal preparation condition, the films change into self-assembled triangular shaped nano-islands with highly regulated orientation. Interesting magnetic and optical properties have been observed in these BaFe12O19 nanostructures. We believe this work may provide a unique opportunity to investigate anomalous phenomenons associated with nanostructured magnetic oxides and the growth dynamics of ferrite films. Close