First-principles calculations of the magnetic anisotropic constants of Co-Pd multilayers: Effect of stacking faults

G. Wu, K. H. Khoo, M. H. Jhon, H. Meng, S. Y H Lua, R. Sbiaa, C. K. Gan

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Using first-principles density functional theory calculations with spin-orbit coupling, we systematically investigate the magnetic anisotropic energy (MAE) of Co nPd m (n+m=5) magnetic multilayers. We consider the influences of the relative atomic weight of Co, w Co, stacking fault, and external stress on the MAE. We find that out-of-plane lattice constant, saturation magnetization, and magnetic moments are almost linearly correlated with w Co. The magnetic anisotropic constant (MAC) curve of Co nPd m without stacking fault shows a near-linear dependence on w Co that agrees with our derived effective MAC K u eff which includes shape, magneto-crystalline, and magneto-elastic contributions. We also show that the contributions from Pd layers to both the total magnetic moments and magnetic anisotropy are significant. The stress anisotropy due to the substrate has a weak effect on the MAC. However the stacking fault has a strong effect on the MAC. When the Co layer is thin, a Co-Pd interface without stacking fault is necessary for higher K u eff. However, when the Co layer is thick, creating stacking faults inside the Co region may produce a larger K u eff. Our study suggests the ways to increase the perpendicular magnetic anisotropy in Co-Pd multilayer systems and subsequently leads to the development of novel magnetic recording devices.

Original languageEnglish
Article number17001
JournalEPL
Volume99
Issue number1
DOIs
Publication statusPublished - Jul 2012

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crystal defects
anisotropy
magnetic moments
atomic weights
magnetic recording
density functional theory
orbits
saturation
magnetization
energy
curves

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

First-principles calculations of the magnetic anisotropic constants of Co-Pd multilayers : Effect of stacking faults. / Wu, G.; Khoo, K. H.; Jhon, M. H.; Meng, H.; Lua, S. Y H; Sbiaa, R.; Gan, C. K.

In: EPL, Vol. 99, No. 1, 17001, 07.2012.

Research output: Contribution to journalArticle

Wu, G. ; Khoo, K. H. ; Jhon, M. H. ; Meng, H. ; Lua, S. Y H ; Sbiaa, R. ; Gan, C. K. / First-principles calculations of the magnetic anisotropic constants of Co-Pd multilayers : Effect of stacking faults. In: EPL. 2012 ; Vol. 99, No. 1.
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