Magnetic structure of zinc-ferrite approaching nanometer sizes

被引：8

作者：

Morrish, AH ^{[1
]}

Li, ZW

Jiang, JZ

机构：

[1] Univ Manitoba, Dept Phys, Winnipeg, MB R3T 2N2, Canada

[2] Tech Univ Denmark, Dept Phys, DK-39800 Lyngby, Denmark

来源：

INTERNATIONAL JOURNAL OF MODERN PHYSICS B | 2001年 / 15卷 / 24-25期

关键词：

Zn-ferrite; 10 nm particles; Mossbauer spectra;

D O I：

10.1142/S0217979201007683

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A unit cell of a spinel ferrite is just under I nm, actually about 0.8 nm. Particles approaching this size can be expected to possess properties that differ from the bulk material. Bulk polycrystalline Zn-ferrite (ZnFe2O4) has been ball milled; after 50 h the average particle size is about 13 nm. The Fe-57 Mossbauer spectra at T = 4.2 K with and without a large (52 kOe) magnetic field applied longitudinally establish that the antiferromagnetic structure of the bulk has become ferrimagnetic in the ten nanometer particles via the transfer of some Zn cations from the A (tetrahedral) sites to the B (octahedral) sites. In addition, there is a large non-collinearity in the magnetic structure.

引用

页码：3312 / 3316

页数：5