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Nanomagnetic Particle-Based Information Processing
- Source :
- IEEE Transactions on Nanotechnology. 18:983-988
- Publication Year :
- 2019
- Publisher :
- Institute of Electrical and Electronics Engineers (IEEE), 2019.
-
Abstract
- Understanding the physics of spintronic devices in the 3-nm size range can pave the way to next-generation energy-efficient information processing devices. To build a spin computer, a layer of 3-nm CoFe 2 O 4 nanoparticles was sandwiched as a central layer into the standard spin-transfer torque magnetic tunneling junction (STT-MTJ) stack. With further focused ion beam (FIB) trimming, a dual-layer junction consisting of one or more nanoparticles separating two CoFeB ferromagnetic layers was turned into a two-terminal spintronic device. The measured room-temperature electron transport through the device showed a staircase effect reminiscent of a single electron transport, which in addition depended on the relative orientations of the magnetic states of the ferromagnetic layers and the high-anisotropy ferrimagnetic nanoparticle. Besides having the staircase steps, the V-I curve indicated switching of the nanoparticles magnetization through the STT effect at currents of above 0.05 uA. The magnetoresistance (MR) curve of this device with the magnetic field applied perpendicular to the junction had an anomalous oscillatory field dependence in a relatively low field range of below 100 Oe.
- Subjects :
- Materials science
Spintronics
Magnetoresistance
Condensed matter physics
Condensed Matter::Mesoscopic Systems and Quantum Hall Effect
Focused ion beam
Computer Science Applications
Magnetic field
Condensed Matter::Materials Science
Magnetization
Ferromagnetism
Ferrimagnetism
Electrical and Electronic Engineering
Quantum tunnelling
Subjects
Details
- ISSN :
- 19410085 and 1536125X
- Volume :
- 18
- Database :
- OpenAIRE
- Journal :
- IEEE Transactions on Nanotechnology
- Accession number :
- edsair.doi...........6ca9f081fb2c3bdabae4f16588525d58