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Title: L1 0-FeNi films on Au-Cu-Ni buffer-layer: a high-throughput combinatorial study

Abstract

Here, the fct L1 0-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/m 3. This anisotropy is attributed to the partial formation of the L1 0 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 L1 0more » FeNi phase.« less

Authors:
 [1]; ORCiD logo [2];  [1];  [1];  [3];  [4];  [1];  [1];  [5];  [6];  [6];  [6];  [7];  [7]
  1. NCSR Demokritos, Athens (Greece)
  2. Univ. of Politecnica delle Marche, Ancona (Italy)
  3. Univ. of Duisburg-Essen, Duisburg (Germany); Zavoisky Physical-Technical Institute, Kazan (Russian Federation)
  4. Univ. of Duisburg-Essen, Duisburg (Germany); Immanuel Kant Baltic Federal Univ., Kaliningrad (Russian Federation)
  5. Stanford Univ., Menlo Park, CA (United States)
  6. IMM-CNR, Catania (Italy)
  7. Istituto di Struttura della Materia, Roma (Italy)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1490670
Grant/Contract Number:  
AC02-76SF00515
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 8; Journal Issue: 1; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE

Citation Formats

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., and Varvaro, G. L10-FeNi films on Au-Cu-Ni buffer-layer: a high-throughput combinatorial study. United States: N. p., 2018. Web. doi:10.1038/s41598-018-34296-9.
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. L10-FeNi films on Au-Cu-Ni buffer-layer: a high-throughput combinatorial study. United States. doi:10.1038/s41598-018-34296-9.
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., and Varvaro, G. Mon . "L10-FeNi films on Au-Cu-Ni buffer-layer: a high-throughput combinatorial study". United States. doi:10.1038/s41598-018-34296-9. https://www.osti.gov/servlets/purl/1490670.
@article{osti_1490670,
title = {L10-FeNi films on Au-Cu-Ni buffer-layer: a high-throughput combinatorial study},
author = {Giannopoulos, G. and Barucca, G. and Kaidatzis, A. and Psycharis, V. and Salikhov, R. and Farle, M. and Koutsouflakis, E. and Niarchos, D. and Mehta, A. and Scuderi, M. and Nicotra, G. and Spinella, C. and Laureti, S. and Varvaro, G.},
abstractNote = {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.},
doi = {10.1038/s41598-018-34296-9},
journal = {Scientific Reports},
issn = {2045-2322},
number = 1,
volume = 8,
place = {United States},
year = {2018},
month = {10}
}

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Figures / Tables:

Figure 1 Figure 1: (a) Representative room temperature polar field-dependent magnetization loops showing the systematic change of the coercivity (HC) with the Au-Cu-Ni stoichiometry. (b) Color-coded coercive field diagram; the numbers (X, Y) identify the measured areas on the wafer corresponding to different Au-Cu-Ni compositions. The applied magnetic field range of themore » hysteresis loops is ±5 kOe.« less

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Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.