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Magneto-elastic switching of magnetostrictive nanomagnets with in-plane shape anisotropy

Authors :
Abeed, Md. Ahsanul
Atulasimha, Jayasimha
Bandyopadhyay, Supriyo
Source :
Journal of Physics: Condensed Matter, Vol. 30, 394001 (2018)
Publication Year :
2018

Abstract

We theoretically study the effect of a material defect (material void) on switching errors associated with magneto-elastic switching of magnetization in elliptical magnetostrictive nanomagnets having in-plane magnetic anisotropy. We find that the error probability increases significantly in the presence of the defect, indicating that magneto-elastic switching is particularly vulnerable to material imperfections. Curiously, there is a critical stress value that gives the lowest error probability in both defect-free and defective nanomagnets. The critical stress is much higher in defective nanomagnets than in defect-free ones. Since it is more difficult to generate the critical stress in small nanomagnets than in large nanomagnets (having the same energy barrier for thermal stability), it would be a challenge to downscale magneto-elastically switched nanomagnets in memory and other applications where reliable switching is required. This is likely to be further exacerbated by the presence of defects.

Details

Database :
arXiv
Journal :
Journal of Physics: Condensed Matter, Vol. 30, 394001 (2018)
Publication Type :
Report
Accession number :
edsarx.1803.05869
Document Type :
Working Paper
Full Text :
https://doi.org/10.1088/1361-648X/aadb6a