Magnetic properties of γ-Fe2O3 nanoparticles

被引：3
|
作者：
Choi, B. J.
Kim, S. H.
Jeon, Y. T.
Moon, J. Y.
Lee, G. H. [1 ]
Chang, Y.
Park, J.
机构：
[1] Kyungpook Natl Univ, Dept Chem, Coll Nat Sci, Taegu 702701, South Korea
[2] Kyungpook Natl Univ & Hosp, Sch Med, Dept Diagnost Radiol, Taegu 702701, South Korea
[3] Korea Univ, Dept Chem, Jochiwon 339700, South Korea
来源：
INTERNATIONAL JOURNAL OF MODERN PHYSICS B | 2006年 / 20卷 / 25-27期
关键词：
gamma-Fe2O3; nanoparticles; size dependence magnetic properties;
D O I：
10.1142/S0217979206041458
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We produced maghemite (gamma-Fe2O3) nanoparticles with average particle diameters of 6, 7, and 12 nm and investigated their magnetic properties. The structure was determined to be face centered-cubic with a lattice constant of a = 8.350 +/- 2 A, similar to the bulk material for all samples. We observed that the gamma-Fe2O3 nanoparticles, with average particle diameters of 6 and 7 nm, were superparamagnetic at room temperature with blocking temperatures of 138 and 168 K, respectively. Those with an average particle diameter of 12 nm are ferrimagnetic at room temperature.
引用
收藏
页码：4422 / 4425
页数：4
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