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Chin. Phys. B, 2014, Vol. 23(10): 107503    DOI: 10.1088/1674-1056/23/10/107503
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev   Next  

Cation distributions estimated using the magnetic moments of the spinel ferrites Co1-xCrxFe2O4 at 10 K

Shang Zhi-Fenga, Qi Wei-Huaa, Ji Deng-Huia b, Xu Jinga, Tang Gui-Dea, Zhang Xiao-Yuna, Li Zhuang-Zhia, Lang Li-Lia
a Hebei Advanced Thin Film Laboratory, Department of Physics, Hebei Normal University, Shijiazhuang 050024, China;
b Department of Physics and Electronic Science, Liupanshui Normal University, Liupanshui 553004, China
Abstract  (A)[B]2O4 ferrite samples with the composition Co1-xCrxFe2O4 (0.0 ≤ x ≤ 1.0) are prepared using a hydrothermal method, and subjected to calcining in a tube furnace with an argon-flow at 1673 K for 2 h. X-ray diffraction patterns indicate that each of all the samples has a single phase cubic spinel structure with a space group of Fd3 m. Magnetic measurements show that the saturation magnetization decreases with as the Cr content x increases. The cation distribution of the samples is estimated by fitting the dependence of the magnetic moments on x at 10 K, using the quantum mechanical model previously proposed by our group. The calculated sum of the content values of the Cr3+ and Cr2+ cations occupying the (A) sites increases as the value of x increases. In the fitting process, the magnetic moment directions of the Cr3+ and Cr2+ cations are assumed to be antiparallel to those of the Fe and Co cations, respectively, which is in accordance with Hund's rules.
Keywords:  spinel ferrite      magnetic property      cation distribution      ionicity  
Received:  14 January 2014      Revised:  14 April 2014      Accepted manuscript online: 
PACS:  75.75.-c (Magnetic properties of nanostructures)  
  81.40.Rs (Electrical and magnetic properties related to treatment conditions)  
Fund: Project supported by the National Natural Science Foundation of China (Grant No. NSF-11174069), the Natural Science Foundation of Hebei Province, China (Grant No. E2011205083), the Key Item Science Foundation of the Education Department of Hebei Province, China (Grant No. ZD2010129), and the Young Scholar Science Foundation of the Education Department of Hebei Province, China (Grant No. QN20131008).
Corresponding Authors:  Tang Gui-De     E-mail:  tanggd@mail.hebtu.edu.cn
About author:  75.75.-c; 81.40.Rs

Cite this article: 

Shang Zhi-Feng, Qi Wei-Hua, Ji Deng-Hui, Xu Jing, Tang Gui-De, Zhang Xiao-Yun, Li Zhuang-Zhi, Lang Li-Li Cation distributions estimated using the magnetic moments of the spinel ferrites Co1-xCrxFe2O4 at 10 K 2014 Chin. Phys. B 23 107503

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