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Micromagnetic modeling of the shielding properties of nanoscale ferromagnetic layers
- Source :
- Journal of Applied Physics. 120:123903
- Publication Year :
- 2016
- Publisher :
- AIP Publishing, 2016.
-
Abstract
- Ferromagnetic shields are widely used to concentrate magnetic fields in a target region of space. Such shields are also used in spintronic nanodevices such as magnetic random access memory and magnetic logic devices. However, the shielding properties of nanostructured shields can differ considerably from those of macroscopic samples. In this work, we investigate the shielding properties of nanostructured NiFe layers around a current line using a finite element micromagnetic model. We find that thin ferromagnetic layers demonstrate saturation of magnetization under an external magnetic field, which reduces the shielding efficiency. Moreover, we show that the shielding properties of nanoscale ferromagnetic layers strongly depend on the uniformity of the layer thickness. Magnetic anisotropy in ultrathin ferromagnetic layers can also influence their shielding efficiency. In addition, we show that domain walls in nanoscale ferromagnetic shields can induce large increases and decreases in the generated magnetic field. Therefore, ferromagnetic shields for spintronic nanodevices require careful design and precise fabrication.
- Subjects :
- 010302 applied physics
Materials science
Magnetic domain
Condensed matter physics
Ferromagnetic material properties
Physics::Instrumentation and Detectors
General Physics and Astronomy
02 engineering and technology
Condensed Matter::Mesoscopic Systems and Quantum Hall Effect
021001 nanoscience & nanotechnology
01 natural sciences
Magnetic susceptibility
Condensed Matter::Materials Science
Magnetization
Magnetic anisotropy
Nuclear magnetic resonance
Magnetic shape-memory alloy
0103 physical sciences
Electromagnetic shielding
0210 nano-technology
Saturation (magnetic)
Subjects
Details
- ISSN :
- 10897550 and 00218979
- Volume :
- 120
- Database :
- OpenAIRE
- Journal :
- Journal of Applied Physics
- Accession number :
- edsair.doi...........e1dafd0df53e9954f6ff05496933324d