Reversed interface effects in amorphous FeZr/AlZr multilayers

Ahlberg, Martina; Zamani, Atieh; Östman, Erik; Fashandi, Hossein; Hjörvarsson, Bjørgvin; Jönsson, Petra E.

doi:10.1103/physrevb.90.184403

Cited by 7 publications

(1 citation statement)

References 60 publications

(75 reference statements)

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“…If it is possible to control the process of diffusion, then we can control the region of interface, and further manipulate the interface to realize the different properties (magnetic and mechanical properties). Chen et al [2] [13] the interface have made critical temperature anomalous enhance when the thickness of the magnetic layer is decreased from 6 nm to 2 nm in the amorphous FeZr/AlZr multilayers. It will be anticipated for us to achieve some extraordinary properties with manipulating the interface.…”

Section: Introductionmentioning

confidence: 99%

Nanostructure and Magnetic Properties of Fezr/Cuzr Multilayers

Sun¹,

Feng²,

Peng³

et al. 2017

Proceedings of the 3rd Annual International Conference on Advanced Material Engineering (AME 2017)

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Abstract. Fe 75 Zr 25 /Cu 64 Zr 36 multilayers metallic glass thin films have been prepared by magnetron sputtering herein. The magnetic studies shown that the saturation magnetization of this alloys increase after annealing under glass transition temperature (T g ). The change of the magnetization might be attribute to structural transformation triggered by diffusion. This work offers an avenue to modify the nanostructure of thin films, and further to manipulate the physical properties of metallic glasses.

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Section: Introductionmentioning

confidence: 99%

Nanostructure and Magnetic Properties of Fezr/Cuzr Multilayers

Sun¹,

Feng²,

Peng³

et al. 2017

Proceedings of the 3rd Annual International Conference on Advanced Material Engineering (AME 2017)

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Tuning in-plane magnetic anisotropy and temperature stability in amorphous trilayers

Löfstrand,

Rani,

Jönsson

et al. 2023

Journal of Magnetism and Magnetic Materials

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The impact of nanoscale compositional variation on the properties of amorphous alloys

Gemma

Baben

Pundt

et al. 2020

Sci Rep

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The atomic distribution in amorphous FeZr alloys is found to be close to random, nevertheless, the composition can not be viewed as being homogenous at the nm-scale. The spatial variation of the local composition is identified as the root of the unusual magnetic properties in amorphous Fe 1−x Zr x alloys. The findings are discussed and generalised with respect to the physical properties of amorphous and crystalline materials. The physical properties of amorphous materials are only partially understood and the relation between local atomic arrangements and emergent physical properties are not fully explored. Crystalline materials are readily characterised with respect to structure and chemical composition using standard scattering techniques, while amorphous materials being disordered, do not offer that possibility. Since the pioneering work on the amorphization of metals 1 and alloys 2 , the field has developed substantially and a large variety of methods are now available for the fabrication of amorphous alloys 3. While the end products are not always identical with respect to physical and chemical properties, it is challenging to identify the underlying reason for the observed differences. The atomic arrangements in amorphous alloys are not well-defined, exhibiting close resemblance to liquid like structures 4 , rendering the task of linking their structure to the observed physical properties challenging. Amorphous materials are known to exhibit extraordinary mechanical properties 5-9 and some of the observations can be rationalised using computational methods, e.g. linking shear-resistant structural 10 to the presence of short-range order 11. High-density icosahedral packing of atoms, with a Voronoi coordination polyhedron with index 0,0,12,0 , i.e. all nearest-neighbor pairs are five-fold bonds, exhibit the highest resistance to shear transformations, while the less-ordered and less-densely packed regions are easier to shear 10. These results have e.g. been used to explain the temperature dependence of the elastic limit of CoB metallic glasses 12. Amorphous metals do not only exhibit extraordinary mechanical properties, their magnetic properties are equally unique. For example, metallic glasses can be extremely soft magnetically, exhibit gigantic magnetic proximity effects 13 and have even been shown to violate Hund's third rule 14. The spatial variations in concentration and coordination number can be assumed to play a similar role for the magnetic and mechanical properties as e.g. discussed in the analysis of the density, elastic and magnetic properties of CoFeTaB and CoFeTaSi alloys using ab initio theory 15,16. This point is also immediately at hand when discussing the proposed magnetic states in amorphous Fe, which depends strongly on the distribution in the alloying element-induced atomic distances in Fe 17-19. While the spatial variation in atomic density and coordination number are used for rationalising the mechanical and magnetic properties of amorphous materials, the experimental determination of t...

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Reversed interface effects in amorphous FeZr/AlZr multilayers

Cited by 7 publications

References 60 publications

Nanostructure and Magnetic Properties of Fezr/Cuzr Multilayers

Nanostructure and Magnetic Properties of Fezr/Cuzr Multilayers

Tuning in-plane magnetic anisotropy and temperature stability in amorphous trilayers

The impact of nanoscale compositional variation on the properties of amorphous alloys

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