Wiese, Nils: Coupling phenomena and scalability of CoFeB/Ru/CoFeB sandwiches. 2006
Inhalt
- Introduction
- Theory
- Tunneling Magnetoresistance (TMR)
- Tunneling phenomena in thin film systems
- Spin-dependent tunneling phenomena
- Typical stack systems for TMR experiments
- Interlayer exchange coupling
- Coupling through non-magnetic spacer layers
- Exchange Bias
- Néel coupling
- Direct ferromagnetic coupling via pinholes
- Stray field or dipolar coupling
- Magnetization reversal in sub-micrometer magnetic elements
- Switching of sub-micrometer sized AFi layers
- Micromagnetic simulation
- Preparation and characterization
- Results and discussion
- Unpatterned CoFe/Ru/CoFe and CoFeB/Ru/CoFeB
- Experimental and simulated magnetization loops
- Coupling versus spacer thickness
- Dependence of coercivity on Q value
- Annealing temperature dependence and stability
- Temperature dependence of AF coupling
- Structural investigations on CoFeB
- Transport properties
- Sub-micrometer sized CoFeB/Ru/CoFeB elements
- Micromagnetic simulation
- Experimental results and discussion
- Spin-flop switching
- MFM on sub-micrometer scaled elements
- Exchange bias
- Summary
- NanoMOKE2™
- Acknowledgement
- References