Magnetic interaction evidence in α-Fe2O3 nanoparticles by magnetization and Mossbauer measurements

被引：59

作者：

Vasquez-Mansilla, M

Zysler, RD ^{[1
]}

Apciprete, C

Dimitrijewits, MI

Saragovi, C

Greneche, JM

机构：

[1] Comis Nacl Energia Atom, Ctr Atom Bariloche, RA-8400 Bariloche, Rio Negro, Argentina

[2] Ctr Atom Constituyentes, Comis Nacl Energia Atom, Dept Phys, RA-1429 Buenos Aires, DF, Argentina

[3] Univ Maine, Lab Phys Etat Condense, UPRES A CNRS 6087, F-72085 Le Mans, France

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 1999年 / 204卷 / 1-2期

关键词：

nanoparticles; interparticles interaction; superparamagnetism; Mossbauer spectroscopy;

D O I：

10.1016/S0304-8853(99)00404-7

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Magnetic properties of alpha-Fe2O3 antiferromagnetic particles of 5 nm mean diameter prepared by sol-gel method were investigated by means of static magnetic measurements and Fe-57 Mossbauer spectrometry. The large magnetic moment as well as the anisotropy energy are attributed to the lack of compensation of the antiferromagnetic arrangement essentially located at the surfaces. Zero-field and in-field Mossbauer experiments reveal the existence of magnetic interaction among antiferromagnetic nanoparticles in the sample with higher particle concentration and established the presence of 2 atomic thick surface magnetic layer estimated from a core-shell model. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：29 / 35

页数：7

共 19 条

[1] NONCOLLINEAR SPIN ARRANGEMENT IN ULTRAFINE FERRIMAGNETIC CRYSTALLITES [J].