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

doi:10.1088/1674-1056/23/10/107503

Abstract (A)[B]₂O₄ ferrite samples with the composition Co_1-xCr_xFe₂O₄ (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 (尚志丰), Qi Wei-Hua (齐伟华), Ji Deng-Hui (纪登辉), Xu Jing (徐静), Tang Gui-De (唐贵德), Zhang Xiao-Yun (张晓云), Li Zhuang-Zhi (李壮志), Lang Li-Li (郎莉莉) Cation distributions estimated using the magnetic moments of the spinel ferrites Co_1-xCr_xFe₂O₄ at 10 K 2014 Chin. Phys. B 23 107503


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

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Cation distributions estimated using the magnetic moments of the spinel ferrites Co_1-xCr_xFe₂O₄ at 10 K