Please use this identifier to cite or link to this item:
|Title:||Magnetization reversal and interlayer coupling in Co50 Fe50 nanomagnets||Authors:||Murthy, V.S.N.
|Issue Date:||2009||Citation:||Murthy, V.S.N., Krishnamoorthi, C., Mahendiran, R., Adeyeye, A.O. (2009). Magnetization reversal and interlayer coupling in Co50 Fe50 nanomagnets. Journal of Applied Physics 105 (2) : -. ScholarBank@NUS Repository. https://doi.org/10.1063/1.3072624||Abstract:||We investigated magnetization reversal mechanism in elliptical shaped nanomagnets made from single layer and pseudospin valve Co50 Fe50 films. The structures were fabricated using deep ultraviolet lithography and the lift-off process. We observed that the magnetization reversal process of the single layer elements is strongly dependent on the film thickness. For thickness tCoFe =10 nm, the magnetization reversal process is dominated by a systematic coherent rotation, whereas for tCoFe =60 nm, the reversal process is mediated by vortex nucleation, displacement, and annihilation. By exploiting the thickness dependence of the magnetization reversal process, pseudospin valve nanomagnets from two Co50 Fe50 thicknesses (10 and 60 nm) were fabricated. We also investigated the effect of interlayer exchange coupling in pseudospin valve structures by varying the Cu spacer layer (tCu). For tCu 5 nm, the two ferromagnetic layers are found to be strongly coupled by exchange interaction. The strength of the coupling is significantly dependent on temperature. For tCu 20 nm, the two Co50 Fe50 layers are antiferromagnetically coupled at 300 K. As the temperature is reduced below 50 K, we observed a clear transition from antiferromagnetic to ferromagnetic coupling. © 2009 American Institute of Physics.||Source Title:||Journal of Applied Physics||URI:||http://scholarbank.nus.edu.sg/handle/10635/56561||ISSN:||00218979||DOI:||10.1063/1.3072624|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.