Variation of magnetic properties with different annealed temperatures in the Ni3[Fe(CN)6]2•XH2O

被引：10
|
作者：
Liu, M. [1 ]
Bian, X. F. [1 ]
Xia, Y. F. [1 ]
Bao, Z. [1 ]
Wu, H. S. [1 ]
Xu, M. X. [1 ]
机构：
[1] Southeast Univ, Dept Phys, Nanjing 210096, Peoples R China
来源：
CURRENT APPLIED PHYSICS | 2011年 / 11卷 / 03期
基金：
美国国家科学基金会; 高等学校博士学科点专项科研基金;
关键词：
Nickel hexacyanoferrate; Magnetic properties; Infrared spectroscopy; Mossbauer spectroscopy; Charge transfer; TRANSFER PHASE-TRANSITION; MICROSTRUCTURAL CHANGES;
D O I：
10.1016/j.cap.2010.07.018
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Molecular magnet nickel(II) hexacyanoferrate(III) powder Ni-3[Fe(CN)(6)](2)center dot XH2O was prepared by coprecipitation method. The coprecipitated powder was annealed in vacuum at different temperatures of 140, and 160 degrees C. Water molecules contained in Prussian blue analogues were removed by heating. The annealing of Ni-II ferricyanide induced an inner charge transfer from Ni-II towards Fe-III to form the mixed valence system Ni(II) Ni(III) ferri-ferro-cyanide. Variation of magnetic properties with different annealed temperatures was studied by elemental analysis, powder X-ray diffraction, transmission electron microscopy, Fourier transform infrared, and Mossbauer and magnetization measurements. The differences in magnetic phase transition temperature, coercivity, remanence and effective magnetization are studied. Differences in magnetic properties may be attributed to a partial charge transfer from Ni-II to Fe-III. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：271 / 275
页数：5
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