Walkenhorst, Sascha: Detection of superparamagnetic beads with TMR sensors. 2007
Inhalt
- Introduction
- Theory and Basics
- Magnetism
- Magnetic Fields
- Tunnel Magnetoresistance
- Tunnel Effect
- Magnetic Tunnel Junctions
- Historical Development
- Exchange Bias
- Annealing and Field Cooling
- Magnetoresistive Biosensors
- Thin Films
- Machines
- Exemplary Preparation and Characterization
- Magnetic Particles on AlOx TMR Sensors
- Results of First Sensor Characterization
- Results of In-Plane Measurements
- OOP Measurements with Coils
- OOP Measurements with a Single Permanent Magnet
- OOP Measurements using a Stack of Permanent Magnets
- Conclusion
- Measuring Shape Anisotropy in MTJs with MOKE
- Perpendicular Pinning of MgO-Stack using Shape Anisotropy
- Preparation
- Results and Discussion
- Conclusion
- Characterization of MgO TMR Elements
- Summary and Outlook
- References
- Acknowledgements