Dohmeier, Niklas: Sensors for mechanical stress based on inverse magnetostrictive CoFeB/MgO/CoFeB tunnel junctions. 2019
Inhalt
- Contents
- 1 Fundamentals
- 1.1 Collective magnetism
- 1.2 Micromagnetism
- 1.3 Magnetic pinning
- 1.4 Interlayer exchange coupling
- 1.5 Tunnel magneto resistance
- 1.6 CoFeB/MgO/CoFeB tunnel junctions
- 1.7 Magneto-optic Kerr effect
- 1.8 Magnetostriction
- 2 Experimental Techniques
- 2.1 Sputter deposition
- 2.2 Field annealing
- 2.3 Patterning of TMR stacks
- 2.4 Electric measurements on TMR stacks
- 2.5 MOKE setup
- 2.6 XRD / XRR
- 2.7 Transmission electron microscopy
- 2.8 Inverse magnetostrictive measurements
- 2.9 Layers of the TMR stack
- 2.10 Rotation of the exchange bias direction
- 3 Results and discussion
- 3.1 The natural antiferromagnet Mn83Ir17
- 3.2 Artificial Antiferromagnets
- 3.3 Interlayer exchange coupling strength
- 3.4 Top pinned TMR stacks
- 3.5 Natural and artificial antiferromagnet
- 3.6 Double artificial antiferromagnet
- 4 Conclusion and outlook
- References