Mossbauer studies of La-Zn substitution effect in strontium ferrite nanoparticles

被引：65

作者：

Lee, SW ^{[1
]}

An, SY ^{[1
]}

Shim, IB ^{[1
]}

Kim, CS ^{[1
]}

机构：

[1] Kookmin Univ, Dept Phys, Seoul 136702, South Korea

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2005年 / 290卷

关键词：

sol-gel; Mossbauer; site occupancy; nanoparticles;

D O I：

10.1016/j.jmmm.2004.11.190

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Many studies on cation substitution have been carried out in sintered magnets application, since intrinsic magnetic properties such as saturation magnetization depend on the cation configuration in the M-type hexagonal structure. La-Zn substituted Sr-ferrite nanoparticles were fabricated by a sol-gel method. Their magnetic and structural properties were characterized by using the XRD, VSM, TG/DTA, and Mossbauer spectroscopy. We focused on the Mossbauer effects of non-magnetic ions such as the Zn occupation of 4f(1) and 2b sites in the M-type hexagonal structure. As Substitution x increased, the saturation magnetization increased, and took a maximum at x = 0.2 before decreasing again. We interpret that it is closely related to Zn occupation of 4f(1) and 2b. This was thought to be caused by the preferential location of Zn2+ at the down-spin Fe3+ site. (c) 2004 Elsevier B.V. All rights reserved.

引用

页码：231 / 233

页数：3

共 12 条

[1] Mossbauer and magnetic properties of Co-Ti substituted barium hexaferrite nanoparticles [J].