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Surface Effects in Magnetic Nanoparticles / Edition 1
     

Surface Effects in Magnetic Nanoparticles / Edition 1

by Dino Fiorani
 

ISBN-10: 0387232796

ISBN-13: 9780387232799

Pub. Date: 04/01/2005

Publisher: Springer US

A collection of articles on different approaches to the investigation of surface effects on nanosized magnetic materials, with special emphasis on magnetic nanoparticles. The book provides an overview of progress in the field through recent results.

Overview

A collection of articles on different approaches to the investigation of surface effects on nanosized magnetic materials, with special emphasis on magnetic nanoparticles. The book provides an overview of progress in the field through recent results.

Product Details

ISBN-13:
9780387232799
Publisher:
Springer US
Publication date:
04/01/2005
Series:
Nanostructure Science and Technology Series
Edition description:
2005
Pages:
300
Product dimensions:
7.00(w) x 10.00(h) x 0.81(d)

Table of Contents

Chapter 1Modern Electronic Structure Theory for Complex Properties of Magnetic Materials1
1.1Introduction1
1.2Density functional theory and the FLAPW method2
1.3Results and discussion7
1.4Non collinear magnetism phenomena at surface and interfaces21
Chapter 2Monte Carlo Studies of Surface and Interface Effects in Magnetic Nanoparticles45
2.1Introduction45
2.2The model46
2.3Ferromagnetic particles48
2.4Oxidised particles52
2.5Antiferromagnetic nanoparticles57
2.6Final remarks70
Chapter 3Magnetic Nanoparticles as Many-Spin Systems75
3.1Introduction75
3.2Basic relations78
3.3Nanoparticle as a multi-spin system: finite size vs boundary effects80
3.4A nanoparticle as a multi-spin system: effect of surface anisotropy91
3.5Conclusions102
Chapter 4From Finite-Size and Surface Effects to Glassy Behaviour in Ferrimagnetic Particles105
4.1Frustration in ferrimagnetic oxides105
4.2Glassy behaviour in ferrimagnetic nanoparticles107
4.3Monte Carlo simulations121
4.4Open questions and perspectives136
Chapter 5Effect of Surface Anisotropy on the Magnetic Resonance Properties of Nanosize Ferroparticles141
5.1Introduction141
5.2Spin perturbations in fine particles. Interplay of the exchange and surface energies147
5.3Spin-wave resonance in the presence of a uniaxial surface anisotropy153
5.4Experimental165
5.5FMR in a spherical particle with the Aharoni surface anisotropy172
5.6FMR in a spherical particle with rotable exchange Anisotropy177
5.7Concluding remarks182
Chapter 6Surface-Driven Effects on The Magnetic Behaviour of Oxide Nanoparticles189
6.1Introduction189
6.2Atomic-scale magnetic modeling192
6.3Ferrimagnetic nanoparticles198
6.4Antiferromagnetic nanoparticles206
6.5Remarks213
Chapter 7Exchange Coupling in Iron and Iron/Oxide Nanogranular Systems217
7.1Introduction217
7.2Nanocrystalline Fe219
7.3Fe/Fe oxide nanogranular system228
7.4Conclusions236
Chapter 8Surface and Interparticle Effects in Amorphous Magnetic Nanoparticles239
8.1Introduction239
8.2The core-shell model241
8.3Sample characteristics242
8.4Non-interacting particles243
8.5Interacting nanoparticles258
8.6Conclusions260
Chapter 9Magnetic Anisotropy and Magnetization Reversal Studied in Individual Particles263
9.1Introduction263
9.2Single-particle measurement techniques265
9.3Mechanisms of magnetization reversal at zero kelvin268
9.4Influence of temperature on the magnetization reversal280
9.5Conclusions294
Index299

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