Monodispersed NiO nanoflowers with anomalous magnetic behavior

被引：35

作者：

Ge, M. Y. ^{[1
,2
]}

Han, L. Y. ^{[3
]}

Wiedwald, U. ^{[3
]}

Xu, X. B. ^{[1
,2
]}

Wang, C. ^{[1
,2
]}

Kuepper, K. ^{[3
]}

Ziemann, P. ^{[3
]}

Jiang, J. Z. ^{[1
,2
]}

机构：

[1] Zhejiang Univ, ICNSM, Hangzhou 310027, Peoples R China

[2] Zhejiang Univ, LNSM, Dept Mat Sci & Engn, Hangzhou 310027, Peoples R China

[3] Univ Ulm, Inst Festkorperphys, D-89081 Ulm, Germany

来源：

NANOTECHNOLOGY | 2010年 / 21卷 / 42期

基金：

中国国家自然科学基金;

关键词：

X-RAY-ABSORPTION; COERCIVITY ENHANCEMENT; CATALYTIC-ACTIVITY; HIGH-DENSITY; NANOPARTICLES; PHOTOEMISSION; DICHROISM; POLARIZATION; SPECTRA; SYSTEMS;

D O I：

10.1088/0957-4484/21/42/425702

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Nickel oxide (NiO) nanoflowers, prepared by thermal decomposition, exhibit anomalous magnetic properties far below the blocking temperature, i.e., a cusp in both the zero-field-cooled and field-cooled curves at about 21 K. Detailed characterization discloses that the individual NiO nanoflower consists of porous crystals with holes (1.0-1.5 nm in size) inside. We believe that the low temperature magnetic feature observed here could be a new kind of spin transition for the uncompensated spins around the holes and will trigger more studies in other nanostructured antiferromagnetic materials.

引用

页数：5

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