X-ray study of the interdiffusion and interfacial structure in ferrimagnetic Gd1−xCox/Co multilayers

González, Javier; Andrés, J. P.; Torre, M. A. López de la; Riveiro, José Manuel Suárez; Hase, Thomas P. A.; Tanner, B. K.

doi:10.1063/1.1555364

Cited by 8 publications

(4 citation statements)

References 9 publications

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“…This has been used to prepare Gd 1−x Co x / Co multilayers with lower Co thickness, even down to just 6 Å. 14,15 In fact, multilayers based on exchange-coupled amorphous Gd-Co alloys have been successfully prepared with peculiar configurations of the magnetization. 16 All these results have allowed developing a semiempirical thermodynamical model of the Co-Gd reaction which predicts stable compositions of the amorphous alloys formed in Co/Gd multilayers in good agreement with the experimental values.…”

Section: Introductionmentioning

confidence: 98%

Stacking dependent disordering processes in Gd/Co/Pt(111) studied with surface x-ray diffraction

et al. 2008

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Disordering processes induced by Gd overlayers on 15 atomic layers thick Co films grown on top of a Pt͑111͒ surface have been studied in situ by surface x-ray diffraction. They have been investigated in two structurally different Co layers deposited at different substrate temperatures: a film grown at 220 K consisting of a mixture of hcp and fcc crystallites plus some disordered stacking, and another one grown at room temperature containing more disorder and fcc crystallites only. Gd induced disordering has been found to be dependent on the structure of the Co film since cubic fcc crystallites are more sensitive to disordering than hexagonal ones. In addition, Gd deposition causes a reduction in about 0.5% in the Co interatomic distance in the layer plane, which arises from relaxation of stress in the film. The stress is mainly concentrated in fcc grains, which are more strained in the film plane than hcp ones. Furthermore, Co grains having the substrate fcc stacking sequence are majority in the Co films, and they are more stable against disordering than the corresponding fcc twin ones, suggesting some kind of long-range interaction stabilizing the majority stacking. These structural modifications induced by the Gd overlayers affect the magnetism of the film, as evidenced by the hysteresis loops measured by magneto-optical Kerr effect, probing the Co magnetization, and by resonant x-ray scattering at the Pt L III edge, sensitive to the Pt magnetization at the Co/Pt interface. It has been found that the Gd overlayer changes the magnetization of the whole Co film, increasing significantly its coercive field for thick enough Gd overlayers and reducing the amplitude of the loops. These changes are compatible with the formation of a disordered Co-Gd alloy with reduced magnetic moment for the Co atoms, and they affect the whole Co film down to the Pt interface. All these results illustrate how surface x-ray diffraction can be used to characterize in detail alloying processes happening in thin films of binary systems, especially in those containing heterogeneous mixtures of different phases.

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Section: Introductionmentioning

confidence: 98%

Stacking dependent disordering processes in Gd/Co/Pt(111) studied with surface x-ray diffraction

et al. 2008

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“…This smears out the properties, so much effort was directed towards the quantification and limitation of its extent. A successful strategy was replacing the RE layer by an alloy where RE still dominates the magnetization of that layer [ 28 , 29 , 30 ].…”

Section: Ferrimagnetismmentioning

confidence: 99%

Applied Trends in Magnetic Rare Earth/Transition Metal Alloys and Multilayers

González

Andrés

Antón

2021

Sensors

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Ferrimagnetic thin films formerly played a very important role in the development of information storage technology. Now they are again at the forefront of the rising field of spintronics. From new, more efficient magnetic recording media and sensors based on spin valves to the promising technologies envisaged by all-optical switching, ferrimagnets offer singular properties that deserve to be studies both from the point of view of fundamental physics and for applications. In this review, we will focus on ferrimagnetic thin films based on the combination of rare earths (RE) and transition metals (TM).

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“…However, due to the strong antiferromagnetic exchange interaction at the Co/Gd interface, a layer of roughly 1-2 atomic layers will be magnetized oppositely to Co at room temperature. This process is possibly enhanced by thermodynamically driven interdiffusion [22] between Co and Gd, which is expected to be of particular relevance for the top Gd/Co interface in the double-layer structures, leading to a composition at the interface close to a Gd 40 Co 60 alloy [23,24]. The compensation temperature (T comp. )…”

Section: Characterization Of Compensation Temperaturementioning

confidence: 99%

Dynamics of all-optically switched magnetic domains in Co/Gd heterostructures with Dzyaloshinskii-Moriya interaction

et al. 2020

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X-ray study of the interdiffusion and interfacial structure in ferrimagnetic Gd1−xCox/Co multilayers

Cited by 8 publications

References 9 publications

Stacking dependent disordering processes in Gd/Co/Pt(111) studied with surface x-ray diffraction

Stacking dependent disordering processes in Gd/Co/Pt(111) studied with surface x-ray diffraction

Applied Trends in Magnetic Rare Earth/Transition Metal Alloys and Multilayers

Dynamics of all-optically switched magnetic domains in Co/Gd heterostructures with Dzyaloshinskii-Moriya interaction

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