Large magnetoelectric effects mediated by electric-field-driven nanoscale phase transformations in sputtered (nanoparticulate) and electrochemically dealloyed (nanoporous) Fe–Cu films
作者： Shauna Robbennolt , Alberto Quintana , Eva Pellicer , Jordi Sort
DOI: 10.1039/C8NR03924K
关键词:
摘要: Large magnetoelectric effects are observed in as-sputtered (nanoparticulate-like) and electrochemically dealloyed (nanoporous) 200 nm thick Fe–Cu films. Application of positive voltages decreases both the saturation magnetization (MS) coercivity (HC) films, while negative cause reverse effect (increase MS HC). The relative variations as high 20% for beyond 100% HC, states. These changes magnetic properties caused by controlled reversible electric-field-driven nanoscale phase transformations between face-centered cubic (fcc) body-centered (bcc) structures. transitions turn due to selective redox reactions induced applied voltage, which can be regarded a “magnetoionic effect.” tuning HC with moderate values together sustainable composition investigated alloys (not containing noble metals, opposed many previous works on thin films), pave way towards implementation spintronic devices enhanced energy efficiency functionalities.
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