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Title: Nanocrystalline Electroplated Cu-Ni: Metallic Thin Films with Enhanced Mechanical Properties and Tunable Magnetic Behavior
Authors: Pellicer, Eva ×
Varea, Aïda
Pané, Salvador
Nelson, Bradley J
Menéndez Dalmau, Enric
Estrader, Marta
Suriñach, Santiago
Baró, Maria Dolors
Nogués, Josep
Sort, Jordi #
Issue Date: 2010
Publisher: Wiley-VCH Verlag GmbH
Series Title: Advanced Functional Materials vol:20 issue:6 pages:983-991
Abstract: Nanocrystalline 3mm thick Cu1–xNix (0.45 ≤ x ≤ 0.87) films are electrodeposited galvanostatically onto Cu/Ti/Si (100) substrates, from a citrate- and sulphate-based bath containing sodium lauryl sulphate and saccharine as additives. The films exhibit large values of reduced Young’s modulus (173 < Er < 192 GPa) and hardness (6.4 <H < 8.2 GPa), both of which can be tailored by varying the alloy composition. The outstanding mechanical properties of these metallic films can be ascribed to their nanocrystalline nature—as evidenced by X-ray diffraction, transmission electron microscopy, and atomic force microscopy—along with the occurrence of stacking faults and the concomitant formation of intragranular nanotwins during film growth. Due to their nanocrystalline character, these films also show very low surface roughness (root mean square deviation of around 2 nm). Furthermore, tunable magnetic properties, including a transition from paramagnetic to ferromagnetic behavior, are observed when the Ni percentage is increased. This combination of properties, together with the simplicity of the fabrication method, makes this system attractive for widespread technological applications, including hard metallic coatings or magnetic micro/nano-electromechanical devices.
ISSN: 1616-301X
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Non-KU Leuven Association publications
× corresponding author
# (joint) last author

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