Eggeling, Eike Moritz: Spin-torque induced high frequency excitations and switching in spin-valve nanocontacts. 2012
Inhalt
- Introduction
- Basic theoretical background for spin-torque driven devices
- The giant magnetoresistance effect
- Magnetic domains and hysteresis
- Thin film magnetic coupling mechanisms
- The spin-transfer torque effect
- Macrospin definition of the spin-transfer torque
- Spin-transfer torque and the Landau-Lifschitz-Gilbert equation
- Spin-transfer torque and device geometries
- Spin-transfer driven vortex oscillations
- Characteristic applications
- References of Chapter 2
- Fabrication and characterization techniques
- Deposition techniques
- Lithography techniques
- Etching techniques
- Characterization techniques
- Nanofabrication
- Experimental measurement setup
- References of Chapter 3
- HF excitations and switching in spin-valve nanocontacts
- Mulilayer stack design and magnetotransport properties
- Spin-valve nanocontacts with natural and artificial antiferromagnet
- Joule heating and Seebeck currents in spin-valve nanocontacts
- Degradation effects in spin-valve nanocontacts
- Conclusion of section 4.1
- Current induced vortex oscillations and switching
- Oscillation characteristics and dV/dI features
- Oscillation dependence on the nanocontact size
- The influence of the free layer magnetic moment
- Macrospin model for current induced switching effects
- Micro magnetic simulations of the spin-torque and Oersted field in spin-valve nanocontacts
- Conclusion of section 4.2
- The influence of external magnetic fields and metastability
- Power and linewidth dependence on the external magnetic field
- Frequency dependence on in-plane easy- and hard-axis magnetic fields
- Multi-mode-vortex oscillations and metastability
- Conclusion of section 4.3
- References of Chapter 4
- Summary and Outlook
- Acknowledgment
- Publications and conference contributions
- Curriculum vitae
- List of figures
- List of tabels
- Appendix