IWNMS 2004 (eBook)

Sponsors 5
Preface 10
Surface and Interface Magnetism Using Radioactive Probes 11
1. Introduction 11
2. Three Categories of Experiments 13
3. Ultra-thin Ni on Pd 13
4. Ultra-thin Pd on a Ni Single Crystal 16
5. Pure Ni Surfaces 18
6. Conclusions 20
Acknowledgements 22
References 22
The Ferromagnetic Semiconductor HgCr2Se4 as Investigated with Different Nuclear Probes by the PAC Method 24
1. Introduction 24
2. Methodical and experimental details 25
3. Results and discussion 28
4. Theory of hyper.ne .elds 31
5. Comparison with the other FMSS and conclusions 32
Acknowledgements 33
References 33
The Role of Nuclear Nanoprobes in Inducing Magnetic Ordering in Graphite 34
1. Introduction 34
2. Impurity analysis via PIXE 35
3. The interaction of MeV-protons with graphite 37
4. Magnetic spots 41
5. Discussion 42
References 43
Heavy Ion Irradiated Ferromagnetic Films: The Cases of Cobalt and Iron 45
1. Introduction 45
2. Experiments 46
3. Ion-induced hexagonal to face-centered cubic phase transition in cobalt 47
4. Magnetic softening of Xe-ion irradiated Co/Fe bilayers [20] 49
5. Ion-irradiated iron .lm 52
6. Conclusions and outlook 60
References 61
Exchange Interactions and Curie Temperatures in Dilute Magnetic Semiconductors 63
1. Introduction 63
2. Calculation 64
3. Exchange mechanism 65
4. Percolation effect 67
5. Summary 70
Acknowledgements 70
References 70
Sr2FeMoO6: A Prototype to Understand a New Class of Magnetic Materials 72
1. Introduction 72
2. Magnetoresistance and magnetization 73
3. Crystal and electronic structure of Sr2FeMoO6 73
4. Description of valence and conduction bands of Sr2FeMoO6 76
5. Basic concepts on the magnetic structure of Sr2FeMoO6 80
6. A new mechanism 80
References 83
Semiconductor Nanoparticles 85
1. Introduction 85
2. Experimental 87
3. Results and discussion 92
4. Conclusions 96
Acknowledgement 97
References 97
Nanostructuring by Energetic Ion Beams 99
1. Introduction 99
2. RF sputtering and co-sputtering 102
3. Nano particles by low energy ion irradiation 104
4. Swift heavy ions (SHI) in nanostructuring 105
5. Future promising aspects of ion beams in nanostructuring 108
6. Conclusion 109
Acknowledgements 109
References 109
Xenon-ion Induced Magnetic and Structural Modifications of Ferromagnetic Alloys 111
1. Introduction 111
2. Experimental details 112
3. Results 113
4. Discussion and conclusions 122
Acknowledgements 124
References 124
Depth Resolved Structural Studies in Multilayers Using X-ray Standing Waves 126
1. Introduction 126
2. Characterization of the topological structure of the interfaces: Case of Fe/Tb multilayer 129
3. X-ray standing wave characterization of thin .lm structures 132
4. Nuclear resonance .uorescence studies for isotopic depth pro.ling 140
5. Conclusions 143
References 144
Magnetic Study of Nanocrystalline Ferrites and the Effect of Swift Heavy Ion Irradiation 146
1. Introduction 146
2. Experimental 147
3. Results and discussion 149
4. Summary 158
Acknowledgements 158
References 158
Preparation of Fe/Pt Films with Perpendicular Magnetic Anisotropy 160
1. Introduction 160
2. Experimental 161
3. Results and discussion 162
4. Conclusions 165
References 166
Effects of Interface Roughness on Interlayer Coupling in Fe/Cr/Fe Structure 167
1. Introduction 167
2. Experimental 168
3. Results and discussion 169
4. Conclusions 173
Acknowledgements 173
References 173
Effect of Addition of Process Control Agent (PCA) on the Nanocrystalline Behavior of Elemental Silver during High Energy Milling 175
1. Introduction 175
2. Experimental 176
3. Results 177
4. Discussion 180
5. Conclusion 182
References 182
Electron- and Hole-Doping Effects in Manganites Studied by X-Ray Absorption Spectroscopy 183
1. Introduction 183
2. Experimental details 184
3. Results and discussion 184
4. Conclusions 188
Acknowledgements 188
References 188
Nanoencapsulation of Fullerenes in Organic Structures with Nonpolar Cavities 190
1. Introduction 190
References 193
Transport and Magnetic Properties of Eu and Sr Doped Manganite Compound La0.7Ca0.3MnO3 194
1. Introduction 194
2. Experimental 195
3. Results and discussion 195
4. Conclusions 197
Acknowledgements 198
References 198
Oriented Growth of Nanocrystalline Gamma Ferric Oxide in Electrophoretically Deposited Films 199
1. Introduction 199
2. Experimental 201
3. Results and discussion 203
4. Conclusion 208
Acknowledgements 208
References 208
Magnetic and Rheological Characterization of Fe3O4 Ferrofluid: Particle Size Effects 210
1. Introduction 210
2. Experimental 211
3. Results and discussion 211
4. Conclusion 216
Acknowledgements 216
References 216
Magnetic Behaviour of Nano-Particles of Ni0.8Cu0.2Fe2O4 217
1. Introduction 217
2. Experimental details 217
3. Results and discussions 218
4. Conclusions 222
Acknowledgements 222
References 222
Evidence of Clustering in Heusler like Ferromagnetic Alloys 224
Acknowledgements 230
References 230
Influence of 50 MeV Lithium Ion Irradiation on Hyperfine Interactions of Cr0.5 Li0.5 Fe2O4 231
1. Introduction 231
2. Experimental 232
3. Results and discussion 232
Acknowledgements 234
References 235
Concentration Dependence of Room Temperature Magnetic Ordering in Dilute Fe: Ge1jxTex Alloy 236
1. Introduction 236
2. Experimental 237
3. Results and discussion 237
References 241
Magnetic Ordering in Fe0.008Ge1jxDx ( D = As, Bi) 242
1. Introduction 242
2. Experimental 244
3. Results and discussion 245
Acknowledgements 247
References 247
Eu Mössbauer Spectroscopy in La0.48Eu0.29Ca0.33MnO3 248
1. Introduction 248
2. Experimental 249
3. Results and discussion 250
4. Conclusions 254
Acknowledgements 254
References 254
Author Index to Volume 160 (2005) 256