›› 2014, Vol. 23 ›› Issue (10): 107503-107503.doi: 10.1088/1674-1056/23/10/107503
• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇 下一篇
尚志丰a, 齐伟华a, 纪登辉a b, 徐静a, 唐贵德a, 张晓云a, 李壮志a, 郎莉莉a
Shang Zhi-Feng (尚志丰)a, Qi Wei-Hua (齐伟华)a, Ji Deng-Hui (纪登辉)a b, Xu Jing (徐静)a, Tang Gui-De (唐贵德)a, Zhang Xiao-Yun (张晓云)a, Li Zhuang-Zhi (李壮志)a, Lang Li-Li (郎莉莉)a
摘要: (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.
中图分类号: (Magnetic properties of nanostructures)