L10-FeNi films on Au-Cu-Ni buffer-layer: a high-throughput combinatorial study

Giannopoulos, G.; Barucca, G.; Kaidatzis, A.; Psycharis, V.; Salikhov, R.; Farle, M.; Koutsouflakis, E.; Niarchos, D.; Mehta, A.; Scuderi, M.; Nicotra, G.; Spinella, C.; Laureti, S.; Varvaro, G.

doi:10.1038/s41598-018-34296-9

Title: L1₀-FeNi films on Au-Cu-Ni buffer-layer: a high-throughput combinatorial study

Journal Article · Mon Oct 29 00:00:00 EDT 2018 · Scientific Reports

DOI:https://doi.org/10.1038/s41598-018-34296-9· OSTI ID:1490670

Giannopoulos, G. ^[1];

^[2]; Kaidatzis, A. ^[1]; Psycharis, V. ^[1]; Salikhov, R. ^[3]; Farle, M. ^[4]; Koutsouflakis, E. ^[1]; Niarchos, D. ^[1]; Mehta, A. ^[5]; Scuderi, M. ^[6]; Nicotra, G. ^[6]; Spinella, C. ^[6]; Laureti, S. ^[7]; Varvaro, G. ^[7]

NCSR Demokritos, Athens (Greece)
Univ. of Politecnica delle Marche, Ancona (Italy)
Univ. of Duisburg-Essen, Duisburg (Germany); Zavoisky Physical-Technical Institute, Kazan (Russian Federation)
Univ. of Duisburg-Essen, Duisburg (Germany); Immanuel Kant Baltic Federal Univ., Kaliningrad (Russian Federation)
Stanford Univ., Menlo Park, CA (United States)
IMM-CNR, Catania (Italy)
Istituto di Struttura della Materia, Roma (Italy)

Here, the fct L1₀-FeNi alloy is a promising candidate for the development of high performance critical-elements-free magnetic materials. Among the different materials, the Au-Cu-Ni alloy has resulted very promising; however, a detailed investigation of the effect of the buffer-layer composition on the formation of the hard FeNi phase is still missing. To accelerate the search of the best Au-Cu-Ni composition, a combinatorial approach based on High-Throughput (HT) experimental methods has been exploited in this paper. HT magnetic characterization methods revealed the presence of a hard magnetic phase with an out-of-plane easy-axis, whose coercivity increases from 0.49 kOe up to 1.30 kOe as the Au content of the Cu-Au-Ni buffer-layer decreases. Similarly, the out-of-plane magneto-crystalline anisotropy energy density increases from 0.12 to 0.35 MJ/m³. This anisotropy is attributed to the partial formation of the L1₀ FeNi phase induced by the buffer-layer. In the range of compositions we investigated, the buffer-layer structure does not change significantly and the modulation of the magnetic properties with the Au content in the combinatorial layer is mainly related to the different nature and extent of interlayer diffusion processes, which have a great impact on the formation and order degree of the L1₀ FeNi phase.

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Research Organization:: SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC02-76SF00515

OSTI ID:: 1490670

Journal Information:: Scientific Reports, Vol. 8, Issue 1; ISSN 2045-2322

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 10 works

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Title: L1₀-FeNi films on Au-Cu-Ni buffer-layer: a high-throughput combinatorial study