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List of conference contributions 153 [20] C. Caspers, M. Müller, A. X. Gray, A. M. Kaiser, A. Gloskovskii, W. Drube, C. S. Fadley, and C. M. Schneider. The Magnetic Oxide EuO on Silicon for Spinfilters. In HAXPES 2011, Hamburg (Germany), 2011. DESY Photon Science. Poster. [21] C. Caspers, M. Müller, A. Gray, C. S. Fadley, S. Döring, C. Westphal, R. Dittmann, and C. M. Schneider. Bulk and Interface Properties of Magnetic Oxides for Spin Filters. In PhD seminar, Köln (Germany), 2011. II. Physikalisches Insitut der Universität zu Köln. Talk. [22] C. Caspers, M. Müller, A. Gray, C. S. Fadley, S. Döring, C. Westphal, R. Dittmann, and C. M. Schneider. The Magnetic Oxide Europium Oxide as Spin Filter Material. In DPG Spring meeting – Section Condensed Matter, Dresden (Germany), 2011. DPG e.V. Short talk. [23] C. Caspers, M. Müller, A. Gray, C. S. Fadley, S. Döring, C. Westphal, R. Dittmann, and C. M. Schneider. Magnetic Properties and Electronic Structure of EuO and NiFe 2 O 4 .In 471. Wilhelm und Else Heraeus Seminar – Functional Magnetoelectric Oxide Heterostructures, Bad Honnef (Germany), 2011. DPG e.V. Short talk. [24] C. Caspers, M. Müller, A. Gray, C. Fadley, S. Döring, C. Westphal, R. Dittmann, and C. M. Schneider. Growth and Characterization of Ferromagnetic Insulators for Tunnel Magnetoresistance (TMR) Applications. In JARA-FIT nanoelectronics days, Aachen (Germany), 2010. Jülich-Aachen Research Alliance – Future Information Technology. Poster.
Acknowledgement . . . These days, it is truism to say that education is vital, but it is important to remind ourselves of the larger purpose of education. After all, what good is the accumulation of knowledge if it does not lead to a happier life? (the Dalai Lama, 2009) This scientific work was created under valuable support of many individuals. The author expresses his deep gratitude to • My doctoral advisor Prof. Dr. Claus M. Schneider, who provided the opportunity for pursuing this doctoral thesis in his group and shared his treasure trove of experience with us, which helped to render our experiments fruitful. • The co-corrector of my thesis Prof. Dr. Carsten Westphal and the committee members Prof. Dr. Dieter Mergel and Prof. Dr. Klaus Hornberger. • Dr. Martina Müller, for her sedulous and professional guidance through the doctoral studies. Being a part of the fresh and open-minded Young Investigators Group “Oxide Spintronics Laboratory” was an invaluable experience. 228 • Dr. Andrei Gloskovskij, Dr. Mihaela Gorgoi, Dr. Wolfgang Drube, Dr. Sven Döring, Dr. Alexander X. Gray, Dr. Slavomir Nemsac, Dr. Alexander M. Kaiser, and Prof. Dr. Charles S. Fadley for enduring and fruitful support during several HAXPES beamtimes. • JuProf. Dr. Marjana Ležaić and Dr. Konstantin Rushchanskii for the calculation of thermodynamic properties of silicides. • Dr. Martina Luysberg, Doris Meertens, Dr. Claire Besson, Dr. Lutz Baumgarten, Prof. Dr. Harald Ibach, PD Dr. Daniel Bürgler for experimental support and helpful discussions. • The mechanical and electronic workshops, under direction of Kurt Hirtz and Heinz Pfeifer, respectively. In particular, indispensable technical support was provided by Thomas Jansen, Franz-Josef Köhne, Bernd Küpper, and Norbert Schnitzler. • My colleagues Bernardus Zijlstra, Sebastian D. Flade, Michael Hoppe, Stephan Kramer- Sinzinger, Hatice Doğanay, Xiangzhong Zhou, and Rajeswari Jayaraman for experimental support, correcting my writing, and a pleasant atmosphere. Ich danke meinen Eltern für ihre liebevolle Unterstützung.
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Member of the Helmholtz Association
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Forschungszentrum Jülich GmbH Pete
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Zusammenfassung In dieser Doktorarb
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Contents 1. Introduction 1 2. Theor
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List of Figures 2.1. Phase diagram
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List of Figures xi 5.12. Resulting
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1. Introduction Smart and powerful
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3 In the thesis at ha
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2. Theoretical background . . . The
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2.1. The challenge of stabilizing s
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2.2. Electronic structure of EuO 9
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2.3. Magnetic properties of EuO 11
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2.4. Hard X-ray photoemission spect
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2.5. Magnetic circular dichroism in
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3. Experimental details Die Pläne
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3.1. Molecular beam epitaxy for oxi
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3.2. In situ characterization techn
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3.2. In situ characterization techn
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3.3. Experimental developments at t
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3.4. Ex situ characterization techn
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4. Results I: Single-crystalline ep
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59 Table 4.1.: Parameters for stoic
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4.1. Coherent growth: EuO on YSZ (1
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4.2. Lateral tensile strain: EuO on
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4.2. Lateral tensile strain: EuO on
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4.3. Lateral compressive strain: Eu
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5. Results II: The integration of t
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5.1. Chemical stabilization of bulk
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5.2. Thermodynamic analysis of the
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Page 140 and 141: 6. Conclusion and Outlook In the th
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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 172 and 173: Schriften des Forschungszentrums J
Page 175: Schlüsseltechnologien / Key Techno
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