1. Reference layer exchange in spin transfer torque experiment using magnetic-coated nanometric point contacts
- Author
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R. O. Cunha, Luis Gustavo Pereira, M. Heinemann, D.L. Baptista, M.F. Kuhn, and Joao Edgar Schmidt
- Subjects
Materials science ,Spin transfer torque ,Physics::Instrumentation and Detectors ,Nanotips ,chemistry.chemical_element ,Nanotechnology ,Tungsten ,law.invention ,Computer Science::Hardware Architecture ,law ,Torque ,Point (geometry) ,Magnetic thin film ,business.industry ,Magnetic nanotips ,Spin-transfer torque ,Polarizer layer ,Polarizer ,Condensed Matter Physics ,Magneto transport in nanotips ,Electronic, Optical and Magnetic Materials ,Magnetic multilayers ,chemistry ,Optoelectronics ,business ,Layer (electronics) ,Magnetic coating - Abstract
We investigate the importance of using nanotips on a point contact spin-transfer torque (STT) experiment. A systematic analysis comparing the STT in a magnetic thin film in current-perpendicular-to-plane (CPP) geometry sample for magnetic coated and uncoated tungsten nanotips is shown. The STT effect presents a reverse resistance to current behavior when using a magnetic coating layer on the nanotips. We demonstrate that the magnetic layer on the tip may assume the role of a polarizer layer. This effect opens up the possibility of exploiting simpler architectures in STT-based devices, such as STT-random access memory (STT-RAM).
- Published
- 2012
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