Association

More documents

Recommendations

Info

A.1. EuO-related phases and cubic oxide substrates 127 Table A.1.: Eu compounds chemically adjacent to EuO and their properties at a glance. Sorted descendent by chemical stability. Applications in brackets are under development or suggestions by the author. formula magnetism color application Eu 2 O 3 PM 147,210 redish fluorescence color in displays Eu 3 O 4 AF 148,149 , T N = 5.4 K white white fluorescence bulb Eu(OH) 3 transparent EuC 2 FM 211 , T C = 15 K yellow EuC 6 spin frustration 212 , T N =42K EuO FM 18,213 , T C = 69 K blue fluorescence color in displays (spintronics) EuS FM 18,189 , T C = 16 K black spintronics EuSi y PM 191 /AF 214 (metallic electrodes) Eu AF 215 , T N = 90 K / spin spiral 191 grey neutron absorber, (hydrogen storage 216 ) Figure A.1.: EuO in relation to the substrates YSZ (001), MgO (001), LAO (100), and Si (001). Biaxial strain acting on EuO is indicated by arrows. Interface reactivity may occur for the Si substrate.
Table A.2.: Cubic oxides as substrate: lattice parameters and strain with EuO. Negative strain is compressive for EuO, while positive strain is tensile. For LaAlO 3 , the hexagonal lattice parameter is used; and for YAlO 3 , the pseudocubic cell is used. EuO and substrates used in this work are shaded. The substrates are sorted by increasing lateral strain. oxide orientation EuO (001) SrTiO3 STO(001) MgO (001) CaO (001) 12%Sn:In2O3 ITO(001) 9%Y:ZrO2 YSZ(001) YAlO3 LaAlO3 (110) ∗ LAO(100) Si (001) CaF2 (001) SrTiO3 STO(110) linear lattice expansion, aT + Δa = aT 0 (1 + αΔT) α (10 -6 K −1 ) in plane, RT 13 9 14 28 10.2 9.2 8.1 10 2.6 18.7 9 cubic lattice parameter a = aT a750 K (nm) “MBE growth” a300 K (nm) “RT” a77 K (nm) “LN2” a2K(nm) “LHe” 0.5172 0.3917 0.4239 0.4872 1.0178 0.514 0.5142 0.3901 0.4212 0.4811 1.0131 0.512 0.5127 0.3893 0.4199 0.4781 1.0108 0.511 0.5122 0.3890 0.4194 0.4771 1.0100 0.510 0.7458 in [1¯10] 0.7398 in [001] 0.7431 in [1¯10] 0.7371 in [001] 0.7418 in [1¯10] 0.7358 in [001] 0.7413 in [1¯10] 0.7358 in [001] 0.5381 0.5436 0.5517 0.5357 0.5431 0.5471 0.5345 0.5428 0.5448 0.5341 0.5426 0.5440 0.5545 × 0.3917 0.5523 × 0.3901 0.5512 × 0.3893 0.5508 × 0.3890 strain m = a S−a F a F m750 K “MBE growth” m300 K “RT” m77 K “LN2” m2K “LHe” — −24.27% −18.04% −5.80% −1.60% −0.62% — −24.13% −18.08% −6.43% −1.49% −0.43% — −24.07% −18.10% −6.75% −1.42% −0.33% — −24.05% −18.12% −6.85% −1.40% −0.43% +1.96% in [1¯10] +1.14% in [001] +2.19% in [1¯10] +1.36% in [001] +2.32% in [1¯10] +1.48% in [001] +2.34% in [1¯10] +1.51% in [001] +4.04% +5.10% +6.67% +7.21% × −24.27% +4.18% +5.62% +6.40% +7.40% × −24.13% +4.25% +5.87% +6.26% +7.51% × −24.07% +4.28% +5.94% +6.21% +7.54% × −24.05% ∗) the epitaxial relation between EuO (001) and YAlO3 (110) is 45 ◦ rotated in plane, as illustrated nicely in Ulbricht et al. (2008) 25,186 . 128
Page 1 and 2:
Member of the Helmholtz Association
Page 4 and 5:
Forschungszentrum Jülich GmbH Pete
Page 6:
Zusammenfassung In dieser Doktorarb
Page 10 and 11:
Contents 1. Introduction 1 2. Theor
Page 12 and 13:
List of Figures 2.1. Phase diagram
Page 14:
List of Figures xi 5.12. Resulting
Page 18 and 19:
1. Introduction Smart and powerful
Page 20 and 21:
3 In the thesis at ha
Page 22 and 23:
2. Theoretical background . . . The
Page 24 and 25:
2.1. The challenge of stabilizing s
Page 26 and 27:
2.2. Electronic structure of EuO 9
Page 28 and 29:
2.3. Magnetic properties of EuO 11
Page 30 and 31:
Page 32 and 33:
Page 34 and 35:
Page 36 and 37:
2.4. Hard X-ray photoemission spect
Page 38 and 39:
Page 40 and 41:
Page 42 and 43:
Page 44 and 45:
Page 46 and 47:
2.5. Magnetic circular dichroism in
Page 48 and 49:
Page 50 and 51:
Page 52 and 53:
3. Experimental details Die Pläne
Page 54 and 55:
3.1. Molecular beam epitaxy for oxi
Page 56 and 57:
3.2. In situ characterization techn
Page 58 and 59:
3.2. In situ characterization techn
Page 60 and 61:
3.3. Experimental developments at t
Page 62 and 63:
3.4. Ex situ characterization techn
Page 64 and 65:
Page 66 and 67:
Page 68 and 69:
Page 70 and 71:
Page 72 and 73:
Page 74 and 75:
4. Results I: Single-crystalline ep
Page 76 and 77:
59 Table 4.1.: Parameters for stoic
Page 78 and 79:
4.1. Coherent growth: EuO on YSZ (1
Page 80 and 81:
Page 82 and 83:
Page 84 and 85:
Page 86 and 87:
Page 88 and 89:
Page 90 and 91:
Page 92 and 93:
4.2. Lateral tensile strain: EuO on
Page 94 and 95: 4.2. Lateral tensile strain: EuO on
Page 96 and 97: 4.3. Lateral compressive strain: Eu
Page 102 and 103: 5. Results II: The integration of t
Page 104 and 105: 5.1. Chemical stabilization of bulk
Page 114 and 115: 5.2. Thermodynamic analysis of the
Page 122 and 123: 5.3. Interface engineering I: Hydro
Page 128 and 129: 5.4. Interface engineering II: Eu p
Page 134 and 135: 5.5. Interface engineering III: SiO
Page 136 and 137: 5.5. Interface engineering III: SiO
Page 138 and 139: 5.6. Summary 121
Page 140 and 141: 6. Conclusion and Outlook In the th
Page 142 and 143: 125 Outlook and perspectives In the
Page 146 and 147: A.1. EuO-related phases and cubic o
Page 148 and 149: A.2. In situ analysis of the Si (00
Page 150 and 151: Bibliography 133 [13] S. S. P. Park
Page 152 and 153: Bibliography 135 [36] R. E. Dickers
Page 154 and 155: Bibliography 137 [65] R. Sutarto, S
Page 156 and 157: Bibliography 139 [91] P. Braun, M.
Page 158 and 159: Bibliography 141 [116] S. Hüfner.
Page 160 and 161: Bibliography 143 [144] R. Feder and
Page 162 and 163: Bibliography 145 [171] H. Miyazaki,
Page 164 and 165: Bibliography 147 [197] J. Qi, T. Ma
Page 166 and 167: Software and Internet Resources [21
Page 168 and 169: List of own publications 151 [10] R
Page 170 and 171: List of conference contributions 15
Page 172 and 173: Schriften des Forschungszentrums J
Page 175: Schlüsseltechnologien / Key Techno
show all

Association

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?