Title :
Surface Roughness Effects on Magnetization Reversal of Magnetic Ring Elements
Author :
Tzong-Rong Ger ; Hao-Ting Huang ; Chen-Yu Huang ; Mei-Feng Lai
Author_Institution :
Dept. of Power Mech. Eng., Nat. Tsing Hua Univ., Hsinchu, Taiwan
Abstract :
The effect of surface roughness on magnetoresistance of permalloy ring structure is investigated. Microstructured permalloy rings with surface roughness varying from 4.2 to 21 nm were fabricated using electron beam lithography and a chemical etching process. It is found experimentally that the first and second nucleation fields decrease obviously with the surface roughness increasing, and the field range for the flux-closure state is not associated with surface roughness. The results indicate that surface roughness in permalloy ring structure is an important factor that influences the magnetic behaviors of the ring. This result can provide important information for future designs of ring-shaped magnetic devices.
Keywords :
Permalloy; electron beam lithography; etching; ferromagnetic materials; magnetisation reversal; magnetoresistance; nucleation; surface roughness; FeNi; chemical etching; electron beam lithography; magnetic properties; magnetic ring elements; magnetization reversal; magnetoresistance; microstructured permalloy ring structure; nucleation fields; surface roughness; Magnetic domain walls; Magnetic domains; Magnetoresistance; Rough surfaces; Surface morphology; Surface roughness; Surface treatment; Magnetization reversal; magnetoresistance; permalloy films;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2013.2273875