Energy product of cylindrical FePt@CoFe2 and FePt@Fe nanoparticles

We report a theoretical discussion of the impact the composition on the maximum energy product ((BH)max) of core@shell FePt@CoFe2 and FePt@Fe nanocylinders. We have found that the best composition is determined by the competing trends imposed by a strong ferromagnetic core@shell interface exchange e...

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Veröffentlicht in:	AIP advances 2019-12, Vol.9 (12), p.125131-125131-5
Hauptverfasser:	Souza, R. M., Santos, Y. S. M., Oliveira, L. L., Nunes, M. S., Dantas, Ana L., Carriço, A. S.
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Sprache:	eng
Schlagworte:	Composition Exchanging Ferromagnetism Intermetallic compounds Iron Iron compounds Nanoparticles Platinum compounds Shells Stiffness
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container_title	AIP advances
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creator	Souza, R. M. Santos, Y. S. M. Oliveira, L. L. Nunes, M. S. Dantas, Ana L. Carriço, A. S.
description	We report a theoretical discussion of the impact the composition on the maximum energy product ((BH)max) of core@shell FePt@CoFe2 and FePt@Fe nanocylinders. We have found that the best composition is determined by the competing trends imposed by a strong ferromagnetic core@shell interface exchange energy, and the core@shell dipolar interaction energy. The dipolar interaction has a negative impact on the nanocylinder (BH)max value, for shell thickness above a shell material dependent threshold value. We have also found that Fe is the best shell material owing to its much larger exchange stiffness.
doi_str_mv	10.1063/1.5129535
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subjects	Composition Exchanging Ferromagnetism Intermetallic compounds Iron Iron compounds Nanoparticles Platinum compounds Shells Stiffness
title	Energy product of cylindrical FePt@CoFe2 and FePt@Fe nanoparticles
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