Nanoscale dissipation and magnetoresistive 1/f noise in spin valves
Citation:
Diao, Z, Nowak, ER, Haughey, KM, Coey, JMD, Nanoscale dissipation and magnetoresistive 1/f noise in spin valves, Physical Review B, 84, 9, 2011, 094412-Download Item:
Abstract:
Spatial correlations of 1/f noise in yoke-shaped, giant magnetoresistance spin valve sensors are reported. An upper bound of 135 nm, corresponding to a magnetic volume of <10(5) nm(3), is determined for the lateral size of the magnetic fluctuators responsible for the magnetoresistive 1/f noise in regions where the resistance susceptibility is large. The normalized noise power is found to scale inversely with the separation between voltage taps along the arm of the yoke, also consistent with a local noise mechanism. The magnetoresistive 1/f noise is associated with quasiequilibrium fluctuations in the micromagnetic structure having a length scale set by the disorder formed during the deposition and processing of the materials stack.
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Grant Number
Science Foundation Ireland (SFI)
Author's Homepage:
http://people.tcd.ie/jcoeyDescription:
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Author: COEY, JOHN
Sponsor:
Science Foundation Ireland (SFI)Type of material:
Journal ArticleCollections
Series/Report no:
Physical Review B84
9
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Full text availableKeywords:
Condensed matter physics, MAGNETIZATION RIPPLE, THIN-FILMS, SENSORS, FLUCTUATIONS, SPINTRONICSSubject (TCD):
Nanoscience & MaterialsDOI:
http://dx.doi.org/10.1103/PhysRevB.84.094412Metadata
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