Flux closure in two-dimensional magnetite nanoparticle assemblies

被引：24

作者：

Georgescu, M. ^{[1
]}

Klokkenburg, M. ^{[1
]}

Erne, B. H. ^{[1
]}

Liljeroth, P. ^{[1
]}

Vanmaekelbergh, D. ^{[1
]}

van Emmichoven, P. A. Zeijlmans ^{[1
]}

机构：

[1] Univ Utrecht, Debye Inst, NL-3508 TA Utrecht, Netherlands

来源：

PHYSICAL REVIEW B | 2006年 / 73卷 / 18期

关键词：

D O I：

10.1103/PhysRevB.73.184415

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Magnetic force microscopy and spectroscopy are used to study two-dimensional islands of spherical 21-nm magnetite nanoparticles. The observed repulsion of the magnetic tip at the edges of the islands is a clear sign of magnetic ordering: strong magnetic dipole-dipole interactions cause blocking of the nanoparticle dipole moments. These moments will be shown to form flux-closure structures, which is the origin of the magnetic contrast in dense two-dimensional magnetic nanoparticle assemblies.

引用

页数：5

共 21 条

[1] Monte Carlo studies of the dynamics of an interacting monodispersive magnetic-particle system [J].

Andersson, JO ;

Djurberg, C ;

Jonsson, T ;

Svedlindh, P ;

Nordblad, P .

PHYSICAL REVIEW B, 1997, 56 (21) :13983-13988

[2] Calculations of the susceptibility of interacting superparamagnetic particles [J].

Chantrell, RW ;

Walmsley, N ;

Gore, J ;

Maylin, M .

PHYSICAL REVIEW B, 2001, 63 (02)

[3] Dynamics of an interacting particle system: Evidence of critical slowing down [J].

Djurberg, C ;

Svedlindh, P ;

Nordblad, P ;

Hansen, MF ;

Bodker, F ;

Morup, S .

PHYSICAL REVIEW LETTERS, 1997, 79 (25) :5154-5157

[4]

Fried T, 2001, ADV MATER, V13, P1158, DOI 10.1002/1521-4095(200108)13:15<1158::AID-ADMA1158>3.0.CO

[5]

2-6

[6] Influence of dipolar interaction on magnetic properties of ultrafine ferromagnetic particles [J].

García-Otero, J ;

Porto, M ;

Rivas, J ;

Bunde, A .

PHYSICAL REVIEW LETTERS, 2000, 84 (01) :167-170

[7] Quantitative real-space analysis of self-assembled structures of magnetic dipolar colloids -: art. no. 037203 [J].

Klokkenburg, M ;

Dullens, RPA ;

Kegel, WK ;

Erné, BH ;

Philipse, AP .

PHYSICAL REVIEW LETTERS, 2006, 96 (03)

[8] Direct Imaging of zero-field dipolar structures in colloidal dispersions of synthetic magnetite [J].

Klokkenburg, M ;

Vonk, C ;

Claesson, EM ;

Meeldijk, JD ;

Erné, BH ;

Philipse, AP .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2004, 126 (51) :16706-16707

[9] Interparticle magnetic correlations in dense Co nanoparticle assemblies [J].

Kortright, JB ;

Hellwig, O ;

Chesnel, K ;

Sun, SH ;

Fullerton, EE .

PHYSICAL REVIEW B, 2005, 71 (01)

[10] DIPOLE INTERACTIONS WITH RANDOM ANISOTROPY IN A FROZEN FERROFLUID [J].

LUO, WL ;

NAGEL, SR ;

ROSENBAUM, TF ;

ROSENSWEIG, RE .

PHYSICAL REVIEW LETTERS, 1991, 67 (19) :2721-2724

← 1 2 3 →