Please use this identifier to cite or link to this item:
|標題:||Antiferromagnetic layer structure effects on exchange coupling strength in ion-beam deposited Ni80Fe20/cobalt oxide bilayers||作者:||Lin, K.W.
|關鍵字:||exchange coupling;exchange bias;MRAM;NiFe/cobalt oxide bilayers;ion-beam deposition technique;magnetic-properties;bias||Project:||Japanese Journal of Applied Physics Part 1-Regular Papers Brief Communications & Review Papers||期刊/報告no：:||Japanese Journal of Applied Physics Part 1-Regular Papers Brief Communications & Review Papers, Volume 44, Issue 6A, Page(s) 3932-3935.||摘要:||
A series of Ni80Fe20/Cobalt oxide bilayers were prepared by a dual ion-beam deposition technique that produced a layer composition that varied from rock-salt COO (a = 4.27 angstrom) to spinel Co3O4 (a = 8.21 angstrom) with increasing O-2 content in the assist beam. Each polycrystalline layer (similar to 20 nm) exhibited a columnar structure perpendicular to the film surface. A strong temperature dependence of coercivity H-c and exchange bias field He, was found in these Ni80Fe20/cobalt oxide bilayers. At T = 10 K, films prepared with 34% O-2 in the assist beam exhibited an exchange shift H-ex similar to -200 Oe that persisted at temperatures higher than 30 K. The variations in H-c and H-ex as a function of %O-2 are related to the interfacial roughness and magnetic state of COO or Co3O4. The transition temperature of Co3O4 has increased above the bulk value via exchange coupling with the permalloy.
|Appears in Collections:||期刊論文|
Show full item record
TAIR Related Article
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.