Ab initio study of the magnetic configurations on the (001) surfaces of binary FePd and FeRh ordered alloys

Dahmoune, C.; Lounis, Samir; Talanana, M.; Benakki, M.; Bouarab, S.; Demangeat, C.

doi:10.1016/s0304-8853(01)00804-6

Cited by 3 publications

(1 citation statement)

References 16 publications

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“…Theoretical studies have highlighted the importance of a Rh moment to the stability of the FM phase. Ab initio studies 15,31 for Rh-terminated surfaces indicate a magnetic surface reconstruction favoring a p͑1 ϫ 1͒ FM arrangement stable up to nine layers. The termination leads to an increased density of states on the Rh d electrons leading to a moment on the Rh site.…”

Section: Discussionmentioning

confidence: 98%

Ferromagnetism at the interfaces of antiferromagnetic FeRh epilayers

et al. 2010

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The full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. The nanoscale magnetic structure of FeRh epilayers has been studied by polarized neutron reflectometry. Epitaxial films with a nominal thickness of 500 Å were grown on MgO ͑001͒ substrates via molecular-beam epitaxy and capped with 20 Å of MgO. The FeRh films show a clear transition from the antiferromagnetic ͑AF͒ state to the ferromagnetic ͑FM͒ state with increasing temperature. Surprisingly the films possess a FM moment even at a temperature 80 K below the AF-FM transition temperature of the film. We have quantified the magnitude and spatial extent of this FM moment, which is confined to within ϳ60-80 Å of the FeRh near the top and bottom interfaces. These interfacial FM layers account for the unusual effects previously observed in films with thickness Ͻ100 Å. Given the delicate energy balance between the AF and FM ground states we suggest a metastable FM state resides near to the interface within an AF matrix. The length scale over which the FM region resides is consistent with the strained regions of the film.

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Section: Discussionmentioning

confidence: 98%

Ferromagnetism at the interfaces of antiferromagnetic FeRh epilayers

et al. 2010

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Electronic structure calculations of low-dimensional transition metals

Vega

Parlebas

Demangeat

2003

Handbook of Magnetic Materials

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Magnetic phase diagram mapping in Fe1−xRhx composition-spread thin films

Gao

N’Diaye

et al. 2023

Journal of Vacuum Science &Amp; Technology A

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We have fabricated high-quality polycrystalline Fe1− xRh x composition-spread thin films by cosputtering Fe and Rh, and investigated their structural and magnetic transformations as a systematic function of composition. With increasing Rh concentration, Fe1− xRh x thin film undergoes from an α׳ phase to a disordered γ phase and also shows a magnetic transition from a ferromagnetic phase to a paramagnetic phase. Vibrating-sample magnetometry and x-ray magnetic circular dichroism measurements show an antiferromagnetic-ferromagnetic transition in the range of 0.52 < x < 0.58 in the Fe1− xRh x composition gradient at room temperature. Based on our structural and magnetic property mapping, we construct a thin-film phase diagram of Fe1- xRh x. Compared to reported results in bulk alloys, the antiferromagnetic-ferromagnetic transition in the Fe1− xRh x thin films was found to occur at slightly higher Rh concentrations, while the boundary between the pure γ phase and the α׳/ γ mixed phase region is shifted to the lower concentration Rh.

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Ab initio study of the magnetic configurations on the (001) surfaces of binary FePd and FeRh ordered alloys

Cited by 3 publications

References 16 publications

Ferromagnetism at the interfaces of antiferromagnetic FeRh epilayers

Ferromagnetism at the interfaces of antiferromagnetic FeRh epilayers

Electronic structure calculations of low-dimensional transition metals

Magnetic phase diagram mapping in Fe1−xRhx composition-spread thin films

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