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Nickel‐Decorated Silver Nanowires for Polymer‐Based Magnetoelectric Composite
Author(s) -
Martin Baptiste,
Dantras Eric,
Lonjon Antoine,
Laffont Lydia,
Lacabanne Colette
Publication year - 2021
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.202100037
Subject(s) - materials science , composite material , nickel , transmission electron microscopy , nanowire , scanning electron microscope , composite number , coercivity , polymer , condensed matter physics , nanotechnology , metallurgy , physics
Polymer‐based magnetoelectric composites are processed with an intrinsic piezoelectric poly(vinylidenefluoride‐ co ‐trifluoroethylene) (P(VDF‐TrFE)) matrix and high‐aspect‐ratio magnetic nickel–decorated silver nanowires. These core/ shell wires are obtained by the polyol reduction of Ni 2+ ions on high‐aspect‐ratio silver nanowires. Scanning electron microscopy and transmission electron microscopy analyses show a homogeneous and well‐crystallized nickel layer. Magnetic properties of the intrinsic particles and their composites are measured and show a strong enhancement of the coercive field compared to spherical Ni nanopowders. They also show the existence of strong magnetic anisotropy in the composites. The composites processed with a small amount of metallic particles (0.3 vol%) allow the maintaining of the P(VDF‐TrFE) crystalline phase and the ability of a macroscopic polarization. The latter is conducted under a 80 MV m −1 field, leading to a significant d 33 (3.2 pC N −1 ). Thus, the magnetoelectric properties are analyzed and an important coupling coefficient α ME equal to 1.8 V m −1 Oe −1 is measured.