Spin frustration in maghemite nanoparticles

被引：58
|
作者：
Serna, CJ
Bodker, F
Morup, S
Morales, MP
Sandiumenge, F
Veintemillas-Verdaguer, S
机构：
[1] CSIC, Inst Ciencia Mat Madrid, E-28049 Madrid, Spain
[2] Tech Univ Denmark, Dept Phys, DK-2800 Lyngby, Denmark
[3] CSIC, Inst Ciencia Mat Barcelona, E-08193 Barcelona, Spain
来源：
SOLID STATE COMMUNICATIONS | 2001年 / 118卷 / 09期
关键词：
magnetic nanoparticles; laser pyrolysis; Mossbauer spectroscopy; order-disorder effects;
D O I：
10.1016/S0038-1098(01)00150-8
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
A different degree of internal structural disorder is observed in almost identical and uniform gamma -Fe2O3 nanoparticles of about 3.5 +/- 0.6 nm, prepared by laser pyrolysis, by high-resolution transmission electron microscopy (HRTEM) and Mossbauer spectroscopy. This structural disorder is responsible for a different degree of spin frustration that takes place not only at the surface but also inside the particles depending on the preparation method and it has a great influence on the magnetic properties of the material. (C) 2001 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：437 / 440
页数：4
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