Mossbauer Analysis of the Atomic and Magnetic Structure of Alloys

CONTENTS......Page 18
BookmarkTitle:......Page 2
1.2. The nature and probability of the Mössbauer effect......Page 5
Preface to the Russian Edition......Page 10
1.5. The structure of resonance absorption curves of non-ideal crystals......Page 19
Preface......Page 6
1.1. INTRODUCTION......Page 22
1.2. THE NATURE AND PROBABILITY OF THE MÖSSBAUER EFFECT......Page 24
1.3. EFFECTS OF DISPLACEMENT AND SPLITTING OF THE LINES. PARAMETERS OF MÖSSBAUER SPECTRA......Page 30
1.4. THE WIDTH OF THE RESONANCE LINE......Page 38
1.5. THE STRUCTURE OF RESONANCE ABSORPTION CURVES OF NON-IDEAL CRYSTALS......Page 39
2.1. PRELIMINARY COMMENTS......Page 43
2.2. NON-EQUIVALENT POSITIONS OF RESONANT NUCLEI......Page 44
2.3. THE SUPERPOSITION PRINCIPLE......Page 46
2.4. GENERALISED FORM OF THE RESONANCE ABSORPTION CURVE......Page 51
3.1. GENERAL CONSIDERATIONS......Page 55
3.2. EXPERIMENTAL DATA ON THE PERTURBATION OF THE CHARGE AND SPIN DENSITY IN CRYSTALS OF TRANSITION METALS IN DISSOLUTION OF IMPURITIES......Page 59
3.3. FERROMAGNETIC IMPURITY CRYSTALS BASED ON TRANSITION METALS......Page 64
3.3.1. Analysis of the role of different mechanisms in the formation of Hef on atom nuclei......Page 66
3.3.2. Statistical fluctuations of the local environment......Page 71
3.3.3. Method of determination of atomic magnetic moments on the basis of measurements of magnetisation and Hef......Page 73
3.3.4. Calculation of nodal magnetic moments for iron alloys with different impurities. Comparison with neutron diffraction data......Page 74
3.3.5. Physical meaning of partial contributions to Hef. The equation for the isotropic part of the contribution......Page 78
3.4. HYPERFINE STRUCTURE OF MÖSSBAUER SPECTRA OF DILUTED IRON-BASED SOLID SOLUTIONS......Page 79
3.5. ANTIFERROMAGNETICS AND NON-COLLINEAR MAGNETICS......Page 83
4. STRUCTURE OF MÖSSBAUER SPECTRA OF ALLOYS WITH LONG-RANGE AND SHORT-RANGE ATOMIC ORDER......Page 84
4.1. ON SPECIFICS OF INFORMATION OBTAINED IN CONNECTION WITH THE LOCAL-NUCLEAR NATURE OF THE METHOD......Page 85
4.2. ON DETERMINATION OF THE ORDER PARAMETERS......Page 89
4.3. VARIATION OF INTEGRAL INTENSITIES OF SPECTRA COMPONENTS IN THE FORMATION OF SHORT-RANGE AND LONG-RANGE ATOMIC ORDER IN SUBSTITUTIONAL SOLID SOLUTIONS......Page 90
4.4. ACCOUNTING FOR THE EFFECT OF REMOTE COORDINATION SPHERES IN THE PRESENCE OF ATOMIC ORDER......Page 96
4.5. RELATIONSHIP OF THE MEAN VALUE OF THE EFFECTIVE MAGNETIC FIELD WITH THE PARAMETERS OF THE LONG-RANGE AND SHORT-RANGE ATOMIC ORDER......Page 100
4.6. ON EXPERIMENTAL DETERMINATION OF THE VALUE OF THE MEAN FIELD......Page 103
4.7 ANALYTICAL DESCRIPTION OF THE FORM OF MÖSSBAUER SPECTRA OF ORDERED ALLOYS......Page 104
4.8 STRUCTURE OF MÖSSBAUER SPECTRA OF MULTILAYER SUPERLATTICES OF TYPE {Am/Bn}k......Page 107
4.9 ON THE POSSIBILITIES OF EXAMINING THE CHARACTER OF DISTRIBUTION OF INTERSTITIAL IMPURITIES......Page 109
5.1. INVESTIGATION OF THE LONG-RANGE ATOMIC ORDER IN SUBSTITUTION ALLOYS......Page 112
5.2. EXAMPLES OF INVESTIGATION OF THE SHORTRANGE ORDER. INTERATOMIC CORRELATIONS, LOCAL ATOMIC STRUCTURE, NON-IDEAL SOLID SOLUTIONS......Page 130
5.3.1. Iron-based solid solutions......Page 145
5.3.2. Concentrated alloys. Ferromagnetics, antiferromagnetics, non-collinear spin structures......Page 154
5.3.3. Interlayer boundaries in {Am/Bn}k superlattices......Page 162
6. MÖSSBAUER SPECTROSCOPY OF ION-DOPED METALS AND ALLOYS......Page 166
6.1. MÖSSBAUER EFFECT AS THE METHOD OF INVESTIGATION OF ION-DOPED MATERIALS......Page 168
6.2. EFFECT OF RADIATION DEFECTS ON THE PARAMETERS OF THE RIGIDITY OF INTERATOMIC BONDS......Page 171
6.3. LOCALISATION AND MOBILITY OF IMPLANTED ATOMS. THE STRUCTURE AND STABILITY OF FORMED RADIATION DEFECTS......Page 172
6.4. VARIATION OF THE COMPOSITION OF THE SURFACE LAYER OF MULTI-COMPONENT TARGETS......Page 179
6.5. FORMATION AND DISSOLUTION OF PHASES, AMORPHISATION......Page 181
6.6. ION-INDUCED MARTENSITIC TRANSFORMATION......Page 187
6.7. ION MIXING......Page 190
6.8. LONG-RANGE EFFECTS IN ION BOMBARDMENT......Page 192
6.9. CONCLUSIONS......Page 199
A.1.1. DETERMINATION OF THE PARAMETERS OF PHYSICAL MODELS......Page 202
A.1.2. EVALUATION OF ERRORS AND CORRELATION COEFFICIENTS......Page 208
A.1.3. METHODS OF RESTORATION OF THE FUNCTIONS OF DENSITY OF THE DISTRIBUTION OF PARAMETERS OF HYPERFINE INTERACTION......Page 209
A.1.4. THE METHOD OF DIFFERENCE SPECTRA......Page 220
Appendix 2 Linear ill-posed problems. Inverse problems of spectroscopy......Page 224
A.2.1. LINEAR ILL-POSED PROBLEMS......Page 225
A2.2. INVERSE PROBLEMS OF SPECTROSCOPY......Page 230
A.2.3. INCONSISTENCY OF SOME ‘OBVIOUS’ APPROACHES TO SOLVING INVERSE PROBLEMS......Page 232
A.2.4. THE NON-CLASSICAL APPROACH TO THE RESTORATION OF RELATIONSHIPS......Page 235
A.2.5. DISTRIBUTION OF χ2......Page 237
A.2.6. CONCEPT OF REGULARISATION......Page 238
Appendix 3 Relationship of the parameter of pair correlation with the mean effective size of the antiphase domain......Page 242
References......Page 248
Index......Page 266