Ferromagnetic (Ga,Mn)As Layers and ... - OPUS Würzburg

More documents

Recommendations

Info

104 Bibliography [Scho 01] G. M. Schott, W. Faschinger, and L. W. Molenkamp, Appl. Phys. Lett. 79, 1807 (2001). [Scho 03] G. M. Schott, G. Schmidt, L. W. Molenkamp, R. Jakiela, A. Barcz, and G. Karczewski, Appl. Phys. Lett. 82, 4678 (2003). [Scho 04] G. M. Schott, Molekularstrahlepitaxie und Charakterisierung von (Ga,Mn)As Halbleiterschichten, Dissertation, Universität Würzburg (2004). [Schu 04] C. Schumacher, A. S. Bader, T. Schallenberg, N. Schwarz, W. Faschinger, L. W. Molenkamp, and R. B. Neder, J. Appl. Phys. 95, 5494 (2004). [Shen 97] A. Shen, Y. Horikoshi, H. Ohno, and S. P. Guo, Appl. Phys. Lett. 71, 1540 (1997). [Tang 03] H. X. Tang, R. K. Kawakami, D. D. Awschalom, and M. L. Roukes, Phys. Rev. Lett. 90, 107201 (2003). [Thei 03] T. N. Theis and P. M. Horn, Phys. Today 56, 44 (2003). [Vurg 01] I. Vurgaftman, J. R. Meyer, and L. R. Ram-Mohan, J. Appl. Phys. 89, 5815 (2001). [Wang 05] K. Wang, M. Sawicki, K. Edmonds, R. Campion, S. Maat, C. Foxon, B. Gallagher, and T. Dietl, Phys. Rev. Lett. 95, 217204 (2005). [Welp 03] U. Welp, V. Vlasko-Vlasov, X. Liu, J. Furdyna, and T. Wojtowicz, Phys. Rev. Lett. 90, 167206 (2003). [Welp 04] U. Welp, V. K. Vlasko-Vlasov, M. Menzel, H. D. You, X. Liu, J. K. Furdyna, and T. Wojtowicz, Appl. Phys. Lett. 85, 260 (2004). [Weni 07] J. Wenisch, C. Gould, L. Ebel, J. Storz, K. Pappert, M.J. Schmidt, C. Kumpf, G. Schmidt, K. Brunner, and L.W. Molenkamp, Phys. Rev. Lett. 99, 077201 (2007). [West 60] F. G. West, Nature 188, 129 (1960). [Wund 06] J. Wunderlich, T. Jungwirth, B. Kaestner, A. C. Irvine, A. B. Shick, N. Stone, K.-Y. Wang, U. Rana, A. D. Giddings, C. T. Foxon, R. P. Campion, D. A. Williams, and B. L. Gallagher, Phys. Rev. Lett. 97, 077201 (2006). [Xian 05] G. Xiang, A. W. Holleitner, B. L. Sheu, F. M. Mendoza, O. Maksimov, M. B. Stone, P. Schiffer, D. D. Awschalom, and N. Samarth, Phys. Rev. B 71, 1307 (2005).
Publications • J. Wenisch, C. Gould, L. Ebel, J. Storz, K. Pappert, M. J. Schmidt, C. Kumpf, G. Schmidt, K. Brunner, and L. W. Molenkamp, Control of Magnetic Anisotropy in (Ga,Mn)As by Lithography-Induced Strain Relaxation, Phys. Rev. Lett. 99, 077201 (2007). • J. Wenisch, L. Ebel, C. Gould, G. Schmidt, L. W. Molenkamp, and K. Brunner, Epitaxial GaMnAs layers and nanostructures with anisotropy in structural and magnetic properties, J. Cryst. Growth 301-302 638-641 (2007). • K. Pappert, S. Hümpfner, C. Gould, J. Wenisch, K. Brunner, G. Schmidt, and L. W. Molenkamp, A non-volatile-memory device on the basis of engineered anisotropies in (Ga,Mn)As, Nature Physics 3, 573 (2007). • K. Pappert, S. Hümpfner, J. Wenisch, K. Brunner, C. Gould, G. Schmidt, and L. W. Molenkamp, Transport Characterization of the Magnetic Anisotropy of (Ga,Mn)As, Appl. Phys. Lett. 90, 062109 (2007). • S. Hümpfner , K. Pappert, J. Wenisch, K. Brunner, C. Gould, G. Schmidt, and L. W. Molenkamp, Lithographic Engineering of Anisotropies in (Ga,Mn)As, Appl. Phys. Lett. 90, 102102 (2007). • K. Pappert, C. Gould, M. Sawicki, J. Wenisch, K. Brunner, G. Schmidt, and L. W. Molenkamp, Detailed transport investigation of the magnetic anisotropy of (Ga,Mn)As, New J. Phys. 9, 354 (2007). • M. Ghali, T. Kuemmell, R. Arians, J. Wenisch, S. Mahapatra, K. Brunner, and G. Bacher, Electrical manipulation of spin injection into single InAs quantum dots, Journal of Superconductivity and Novel Magnetism 20, 413-416 (2007). • M. Ghali, R. Arians, T. Kuemmell, G. Bacher, J. Wenisch, S. Mahapatra, and K. Brunner, Spin injection into a single self-assembled quantum dot in a p-i-n II- VI/III-V structure, Appl. Phys. Lett. 90, 093110 (2007). • C. Gould, S. Mark, K. Pappert, R. G. Dengel, J. Wenisch, R. P. Campion, A. W. Rushforth, D. Chiba, Z. Li, X. Liu, W. Van Roy, H. Ohno, J. K. Furdyna, B. Gallagher, K. Brunner, G. Schmidt, and L. W. Molenkamp, An extensive comparison of anisotropies in MBE grown (Ga,Mn)As material, New J. Phys. 10, 055007 (2008). • R. G. Dengel, C. Gould, J. Wenisch, K. Brunner, G. Schmidt, and L. W. Molenkamp, Lateral magnetic anisotropy superlattice out of a single (Ga,Mn)As layer, New J. Phys. 10, 073001 (2008). 105
Page 1 and 2:
Ferromagnetic (Ga,Mn)As Layers and
Page 3 and 4:
Contents Zusammenfassung 5 Summary
Page 5 and 6:
Zusammenfassung Ferromagnetische Ha
Page 7 and 8:
Anisotropiekontrolle in (Ga,Mn)As i
Page 9 and 10:
Summary The great promise of ferrom
Page 11 and 12:
Chapter 1 Introduction The event co
Page 13 and 14:
13 investigated with SQUID and magn
Page 15 and 16:
Chapter 2 The (Ga,Mn)As Material Sy
Page 17 and 18:
2.1. Ferromagnetism in (Ga,Mn)As 17
Page 19 and 20:
2.2. Band Structure Calculations in
Page 21 and 22:
2.3. Magnetic Anisotropy 21 growth
Page 23 and 24:
2.3. Magnetic Anisotropy 23 E n e r
Page 25 and 26:
2.3. Magnetic Anisotropy 25 Figure
Page 27 and 28:
Chapter 3 MBE Growth of Ferromagnet
Page 29 and 30:
3.2. Epitaxial Growth of (Ga,Mn)As
Page 31 and 32:
3.3. Crystal Defects 31 lead to a d
Page 33 and 34:
3.4. RHEED 33 Figure 3.5: (a) Ewald
Page 35 and 36:
3.5. X-Ray Diffraction 35 1 0 7 1 0
Page 37 and 38:
3.5. X-Ray Diffraction 37 between t
Page 39 and 40:
3.5. X-Ray Diffraction 39 lattice d
Page 41 and 42:
3.5. X-Ray Diffraction 41 substrate
Page 43 and 44:
Chapter 4 Finite Element Simulation
Page 45 and 46:
4.1. Derivation of the Equation Sys
Page 47 and 48:
4.2. The FlexPDE Software 47 4.2 Th
Page 49 and 50:
4.3. Simulation Results - Physical
Page 51 and 52:
4.3. Simulation Results - Physical
Page 53 and 54: 4.3. Simulation Results - Physical
Page 55 and 56: 4.4. Simulation Results - (In,Ga)As
Page 57 and 58: 4.5. Stripes Along [1¯10] 57 Figur
Page 59 and 60: 4.5. Stripes Along [1¯10] 59 in-pl
Page 61 and 62: Chapter 5 Local Anisotropy Control
Page 63 and 64: 5.1. Patterning and Structural Char
Page 73 and 74: 5.2. Magnetic Characterization 73 p
Page 75 and 76: 5.2. Magnetic Characterization 75 1
Page 77 and 78: 5.2. Magnetic Characterization 77 8
Page 79 and 80: 5.3. Shape Anisotropy 79 ∼ 0.2 k
Page 81 and 82: 5.4. A Model for Anisotropy Orienta
Page 83 and 84: 5.4. A Model for Anisotropy Orienta
Page 85 and 86: Chapter 6 Device Application As sta
Page 87 and 88: 6.2. The Role of the Constriction 8
Page 93 and 94: Chapter 7 Conclusion and Outlook Th
Page 95 and 96: Appendix A Band Structure Hamiltoni
Page 97 and 98: Appendix B Sample FlexPDE Input Fil
Page 99 and 100: 99 BOUNDARIES s u r f a c e ’ s u
Page 101 and 102: Bibliography [Abol 01] M. Abolfath,
Page 103: 103 [McGu 75] T. R. McGuire and R.
Page 107: Acknowledgements There is a number
show all

Ferromagnetic (Ga,Mn)As Layers and ... - OPUS Würzburg

Create successful ePaper yourself

Delete template?

Save as template?