Controlling the structure and magnetic properties of cluster-assembled metallic glasses

Benel, Cahit; Fischer, Arne; Zimina, Anna; Steininger, Ralph; Kruk, Robert; Hahn, Horst; Léon, Aline

doi:10.1039/c8mh01013g

Cited by 9 publications

(7 citation statements)

References 17 publications

(18 reference statements)

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“…A different approach considers the fabrication of materials characterized by nanocrystalline grains of various dimensions with a precise control of the degree of interaction of the nanoscale components, or, in other terms, of their degree of compaction [5,11] (Figure 1(b)). In this case, a precise mass selection of the nanoscale building blocks is not required, thus allowing the production in bulk quantities.…”

Section: Introductionmentioning

confidence: 99%

Electrical conduction in nanogranular cluster-assembled metallic films

Mirigliano

Milani

2021

Advances in Physics: X

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A film fabricated by the assembling of nanoparticles that retain, at least partially, their individuality is expected to show substantially different structural and functional properties compared to the case where atoms or molecules are used as building blocks. Although films assembled with metallic clusters or nanoparticles have been predicted to have unusual functional properties, it has been tacitly assumed that cluster-assembled metallic films have the same conduction behavior observed for polycrystalline metallic thin films grown from atoms. Unexpectedly, in the last decade, several studies showed that nanogranular metallic films show a non-linear electric behavior, substantially different from their polycrystalline counterparts. Here we review and discuss the electrical transport properties of cluster-assembled films. Our aim is to provide a background and a common language for the systematic investigation and exploitation of nanogranular metallic thin films where the extremely high density of defects and grain boundaries causes the departure from ohmic behavior. We will focus on the non-linear electrical conduction and resistive switching relevant for neuromorphic applications.

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Section: Introductionmentioning

confidence: 99%

Electrical conduction in nanogranular cluster-assembled metallic films

Mirigliano

Milani

2021

Advances in Physics: X

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“…Recently, novel metallic glasses that exhibit distinct structural features have been developed, which are the so-called nanoglasses. − As schematically shown in Figure a, a nanoglass consists of amorphous nanometer-sized grains connected by amorphous interfaces (glass–glass interfaces). Arguably, nanoglass provides a testing benchmark for the possible correlation between structure and dynamics in the glass system.…”

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confidence: 99%

Metallic Nanoglasses with Promoted β-Relaxation and Tensile Plasticity

Yang

Pei

et al. 2021

Nano Lett.

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The secondary (β) relaxation is an intrinsic feature of glassy systems and is crucial for the mechanical properties of metallic glasses. However, it remains puzzling what structural features control the β-relaxation fundamentally. Here, we use the recently developed nanoglasses exhibiting well-defined structural features at the nanometer scale to interrogate such structure−dynamics relations. We show that an electrodeposited Ni 77.5 P 22.5 nanoglass exhibits promoted β-relaxation and enhanced microscale tensile plasticity over the most rapidly meltquenched metallic glass with the same composition. Structurally, the βrelaxation is sensitive to the interfacial regions among grains in the nanoglasses. Our results reveal a clear correlation between the amorphous nanostructures and the β-relaxation. It seems that the nanostructuring represents a novel route to obtain high-energy glassy states, that is, the inverse problem of the ultrastable glass.

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“…The glassy nanoparticles are produced by the inert gas condensation technique using helium gas as a quencher medium. However, other methods are also used to produce the nanostructured glassy materials, including electrolysis, sputtering, and molecular beam epitaxy (Ivanisenko et al, 2018;Mohri et al, 2018;Benel et al, 2019;Singh et al, 2020a;Chen et al, 2020).…”

Section: Spd In Nanostructured Metallic Glassmentioning

confidence: 99%

“…However, recently, with the availability of advanced characterization techniques and simulation tools, it has been found that there is chemical inhomogeneity at the atomic level in the MG. Moreover, in recent times, there have been reports on the synthesis of nanostructured MG termed as nanoglass using techniques such as inert gas condensation, sputtering, and electrolysis (Stoesser et al, 2014;Sniadecki et al, 2016;Guo et al, 2017;Mohri et al, 2018;Benel et al, 2019;Chen et al, 2019). These nanoglasses have demonstrated exciting properties that have not been seen in the bulk MG of the same chemical compositions.…”

Section: Introductionmentioning

confidence: 99%

Assessment of Severe Plastic Deformation Processes in Bulk and Nanostructured Metallic Glass

et al. 2022

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The metallic glasses are known as amorphous and metastable materials. These materials have superior mechanical properties over crystalline materials with the same chemistry. Continuous efforts were made to improve the properties of metallic glass. The severe plastic deformation (SPD) method is used to improve the ductility of the glass. SPD causes the deformation at the atomic level in the disordered structure of the glass. Many methods are reported, such as cryogenic cycling, high-pressure torsion, and equal channel angular pressing, which are used for the SPD. In recent works on nanostructured metallic glasses, it has been evidenced that some properties, for example, mechanical, thermal, and magnetic, have improved compared to the bulk metallic glass. This paper has reviewed the recent progress in the SPD of the bulk and nanostructured metallic glasses. Different methods for the SPD have been addressed here. The effect of SPD on the properties of metallic glass is deliberated in this paper. Moreover, the challenging tasks of deformation occurrence in the glass and its characterization were considered, trying to develop a sound understanding of SPD in bulk and nanostructured metallic glasses.

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Controlling the structure and magnetic properties of cluster-assembled metallic glasses

Abstract: The local structure and magnetic properties of amorphous materials are controlled by the impact energy of amorphous clusters.

Cited by 9 publications

References 17 publications

Electrical conduction in nanogranular cluster-assembled metallic films

Electrical conduction in nanogranular cluster-assembled metallic films

Metallic Nanoglasses with Promoted β-Relaxation and Tensile Plasticity

Assessment of Severe Plastic Deformation Processes in Bulk and Nanostructured Metallic Glass

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