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Free and forced Barkhausen noises in magnetic thin film based cross-junctions
- Source :
- Journal of Magnetism and Magnetic Materials. 458:292-300
- Publication Year :
- 2018
- Publisher :
- Elsevier BV, 2018.
-
Abstract
- Barkhausen noise, driven by thermal fluctuations in stationary magnetic field, and Barkhausen jumps, driven by sweeping magnetic field, are demonstrated to be effects of different orders of magnitude. The critical magnetic field for domain walls depinning, followed by avalanched and irreversible magnetization jumps, is determined. Magnetoresistive response of NiFe/M/NiFe (M = Au, Ta, Ag) trilayers to stationary and sweeping magnetic field is studied by means of anisotropic magnetoresistance (AMR) and planar Hall effect (PHE) measurements. Thermal fluctuations result in local and reversible changes of magnetization of the layers in thin film magnetic junctions, while the sweeping magnetic field results in reversible and irreversible avalanched domain motion, dependently on the ratio between the values of sweeping magnetic field and domain wall depinning field. The correlation between AMR and PHE responses to Barkhausen jumps is studied. The value of this correlation is found to be dependent on the α angle between the directions of magnetic field and current path.
- Subjects :
- 010302 applied physics
Materials science
Field (physics)
Magnetoresistance
Condensed matter physics
Thermal fluctuations
02 engineering and technology
021001 nanoscience & nanotechnology
Condensed Matter Physics
01 natural sciences
Electronic, Optical and Magnetic Materials
Magnetic field
Magnetization
symbols.namesake
Domain wall (magnetism)
0103 physical sciences
symbols
Barkhausen stability criterion
0210 nano-technology
Barkhausen effect
Subjects
Details
- ISSN :
- 03048853
- Volume :
- 458
- Database :
- OpenAIRE
- Journal :
- Journal of Magnetism and Magnetic Materials
- Accession number :
- edsair.doi...........f2bc08b6ba6e1c6729e043d6566a188c