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Search Publications by: Brian B. Maranville (Fed)

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Displaying 51 - 55 of 55

Soft magnetic layers for low-field-detection magnetic sensors

May 18, 2006
Author(s)
William F. Egelhoff Jr., Robert McMichael, Cindi L. Dennis, Mark D. Stiles, Freemon Johnson, Alexander J. Shapiro, Brian B. Maranville, Cedric J. Powell
We have investigated a wide variety of soft magnetic layers as sense layers for magnetic-field sensors. We find that in thin-film form, some of these soft materials can have susceptibilities (?) approaching those of the corresponding bulk material. In

Characterization of Magnetic Properties at Edges by Edge Mode Dynamics

April 21, 2006
Author(s)
Brian B. Maranville, Robert McMichael, Sudook A. Kim, Ward L. Johnson, C A. Ross, J Cheng
We have used trapped spinwave or edge modes of magnetic precession to probe the magnetic environment near magnetic film edges magnetized perpendicular to the edge. Micromagnetic models of dynamics in stripes reveal that the edge mode frequency-field

Suppression of Orange-Peel Coupling in Magnetic Tunnel Junctions by Preoxidation

April 17, 2006
Author(s)
William F. Egelhoff Jr., Robert McMichael, Cindi L. Dennis, Mark D. Stiles, Alexander J. Shapiro, Brian B. Maranville, Cedric J. Powell
We have found that preoxidation of the bottom Co electrode in magnetic tunnel junctions (MTJs) very effectively suppresses orange-peel coupling. The result is a free layer that is much softer. Work by others has demonstrated that preoxidation is compatible

Effect of Conformal Roughness on Ferromagnetic Resonance Linewidth in Thin Permalloy Films

May 1, 2005
Author(s)
Brian B. Maranville, J Mallett, Thomas P. Moffat, Robert McMichael, Andrew P. Chen, William F. Egelhoff Jr.
The ferromagnetic resonance line width is a result of both intrinsic damping and contributions from inhomogeneities, which in thin films can be dominated by the roughness. Microstructural measurements and magnetization dynamics are reported here for 50 nm

Surface Anisotropy of Permalloy in NM/NiFe/NM Multilayers

May 1, 2005
Author(s)
J O. Rantschler, P J. Chen, Anthony S. Arrott, Robert D. McMichael, William F. Egelhoff Jr., Brian B. Maranville
We have measured surface anisotropy in Permalloy (Py) deposited between two layers of normal metal (NM = Ag, Cu, or Ta) by determining the total perpendicular anisotropy using both the frequency and angular dependence of ferromagnetic resonance