Bhutta, Khalid Mehmood: Spin dependent transport in continuous and discontinuous CoFeB/MgO heterostructures. 2009
Inhalt
- Introduction
- Theoretical Background
- Ferromagnetism
- Spin Dependent Transport
- Spin Dependent Transport in Bulk Materials
- Spin Dependent Transport in Ordered Systems
- Spin Dependent Transport in Disordered Heterogeneous Systems
- Role of the Barrier in Spin Dependent Tunneling
- Granular Conductivity
- Experimental Investigations
- Experimental Techniques
- Magnetron Sputtering
- Annealing
- DC Resistivity and Magnetoresistance Measurements
- Scanning Electron Microscope (SEM)
- Alternating Gradient Magnetometer (AGM)
- High Resolution Transmission Electron Microscopy
- Atomic Force Microscopy
- Conducting Atomic Force Microscope
- Aspects of CAFM
- Characterization of MgO Tunnel Barriers
- Introduction
- Characterization of Barrier
- X-ray Photoemission Spectroscopy and Secondary Ion Mass Spectroscopy
- Decoration of Pinholes by Electrodeposition of Copper
- Rowell's Criteria
- Conducting Atomic Force Microscopy
- Characterization of an MgO Tunnel Barrier on Ru Bottom Electrode
- Characterization of MgO Tunnel Barrier in Half Finished Magnetic Tunnel Junctions
- Comparison of Hotspots, Resistance and Resistance Area Product with Complete MTJ's
- Effect of Interface Roughness in Resistance of Barrier
- Effect of Air on Hotspot Density
- Conclusion
- Discontinuous Multilayers of CoFeB/MgO
- Granular System
- Influence of CoFeB Layers Thickness on Electric and Magnetotransport Properties
- Influence of the MgO Layer Thickness on Electric and Magnetotransport Properties
- Higher Order Tunneling at Low Temperature
- Coulomb Gap
- Effect of Annealing
- Conclusion
- Summery and Outlook