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Static and dynamic X-ray resonant magnetic scattering studies on magnetic
domains
Soriano, J.M.
Publication date
2005
Link to publication
Citation for published version (APA):
Soriano, J. M. (2005). Static and dynamic X-ray resonant magnetic scattering studies on
magnetic domains.
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C O N T E N T S S
1.. Introduction 7
1.1.. Thin film magnetism 7 1.2.. X-ray resonant magnetic scattering 11
1.3.. This thesis 14
2.. Magneto-optical constants at the rare-earth M4 5 absorption edges 17
2.1.. Introduction 17 2.2.. Optical constants in the soft X-ray range 19
2.3.. Resonant cross sections of the RE M4/5 edges 22
2.3.1.. Calculation of atomic absorption spectra 22
2.3.2.. Gd3 + experimental spectra 24
2.4.. Calculated RE M4/5 magneto-optical constants 26
2.5.. Discussion 31 2.5.1.. Calculated spectra 31
2.5.2.. Applications 35
2.6.. Conclusions 36 3.. An XRMS study of disordered magnetic stripe domains in a-GdFe thin
filmss 39
3.1.. Introduction 39 3.1.1.. Magnetism of amorphous GdFe thin films 42
3.2.. Experimental 43 3.2.1.. Samples: o-GdFe thin films 43
3.2.2.. Small-angle X-ray scattering setup 45
3.3.. Results and discussion 48 3.3.1.. Scattering curves at remanence 48
3.3.2.. Field-dependent scattering curves 49 3.3.3.. Stripe diffraction patterns in the small-angle limit 51
CONTENTSS 5 3.3.4.. Field dependence of total scattered intensity 55
3.3.5.. Interpretation of scattering curves 56
3.3.6.. The effect of disorder 58 3.3.7.. Domain period and magnetization 59
3.4.. Conclusions 62
4.. Study of magnetization dynamics of GdFe thin films 65
4.1.. Introduction 65 4.2.. Magnetic pulse generation 67
4.3.. Magnetic reversal in Gdo.19Feo.8i films 69
4.3.1.. Time-resolved MOKE 70 4.3.2.. Time-resolved XRMS 73
4.3.3.. Discussion 79 4.4.. Magnetic reversal in GdFes 81
4.4.1.. Time-resolved XRMS 81 4.5.. Conclusions and outlook 83
5.. An XRMS study of ion-beam-patterned «-GdTbFe thin films 87
5.1.. Introduction 87 5.2.. Experimental 89 5.2.1.. Samples 89 5.2.2.. Focused-ion-beam irradiation 90 5.3.. Results 92 5.4.. Discussion 97 5.5.. Conclusions 98
6.. An X-ray magneto-optical study of magnetic reversal in perpendicular
exchange-coupledd [Pt/Co]H/FeMn multilayers 101
6.1.. Introduction 101 6.2.. The [Pt/Co]„/FeMn perpendicular exchange bias system 103
6.3.. Results and discussion 105 6.3.1.. XMCD spectroscopy 105 6.3.2.. Element-specific hysteresis loops 107
6.3.3.. Scattering 109 6.4.. Conclusions I l l 7.. Conclusion and Outlook 113
6 6 CONTENTS S
A.. Sensitivity of the Gd3 + optical constants to the calculation parametersll7
A.l.. Atomic multiplet calculation 117
Referencess 120 Summaryy 137 Samenvattingg 139 Resumenn 141 Acknowledgementss 144 Too my friends 145
