Antiferromagnetic spin correlations in MnO nanoparticles

被引：15

作者：

Chatterji, Tapan ^{[1
]}

Su, Yixi ^{[2
]}

Iles, Gail N.

Lee, Yi-Cheng ^{[3
]}

Khandhar, Amit P. ^{[3
]}

Krishnan, Kannan M. ^{[3
]}

机构：

[1] Inst Max Von Laue Paul Langevin, Forschungszentrum Julich Outstn, IFF, JCNS, F-38042 Grenoble 9, France

[2] Outstn FRMII, Forschungszentrum Julich, JCNS, IFF, D-85747 Garching, Germany

[3] Univ Washington, Dept Mat Sci, Seattle, WA 98195 USA

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2010年 / 322卷 / 21期

关键词：

Antiferromagnetism; Nanoparticles; Neutron diffraction; MAGNETIC-PROPERTIES; GLASS;

D O I：

10.1016/j.jmmm.2010.06.019

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have investigated nearly monodispersive MnO nanoparticles of 10 nm diameter by polarised neutron diffraction with XYZ-polarisation analysis. We found no long-range ordering down to 3.5 K. A broad magnetic peak appeared close to Q= (1/2,1/2,1/2) signifying short-range antiferromagnetic correlations. The correlation length was found to be about 2.4 nm at T=3.5 K. The correlation length decreases rapidly with increasing temperature and becomes about 0.7 nm at T=250 K. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：3333 / 3336

页数：4

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