Understanding the Origin of Ferromagnetism in ZnO Porous Microspheres by Systematic Investigations of the Thermal Decomposition of Zn5(OH)8Ac2路2H2O to ZnO

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• 作者：Zhenbo Xia ; Yewu Wang ; Yanjun Fang ; Yuting Wan ; Weiwei Xia ; Jian Sha
• 刊名：Journal of Physical Chemistry C
• 出版年：2011
• 出版时间：August 4, 2011
• 年：2011
• 卷：115
• 期：30
• 页码：14576-14582
• 全文大小：965K
• 年卷期：v.115,no.30(August 4, 2011)
• ISSN：1932-7455

文摘

In this paper, thermogravimetric analyses, Fourier transform infrared spectra, X-ray powder diffraction, photoluminescence, electron paramagnetic resonance, and superconducting quantum interference device magnetometer are applied to observe the thermal decomposition of Zn₅(OH)₈Ac₂路2H₂O to ZnO for understanding the origin of room temperature ferromagnetism in ZnO porous microspheres. The results show that both zinc vacancies and shallow donors induced by hydrogen may play an important role in triggering magnetic order in ZnO samples fabricated by annealing the precursor Zn₅(OH)₈Ac₂路2H₂O at temperature above 400 掳C.