Nanoscale free-standing magnetoelectric heteropillars.
Nanoscale
; 5(15): 6747-53, 2013 Aug 07.
Article
em En
| MEDLINE
| ID: mdl-23812091
ABSTRACT
Nanocomposites with a film-on-substrate geometry usually suffer from a large clamping effect from the substrate, inhibiting the elastic-interaction-mediated "product" property such as the magnetoelectric response in piezoelectric-magnetostrictive systems. Here we report a self-assembling strategy to synthesize nanoscaled free-standing magnetoelectric heteropillars. The degree of clamping from the substrate has been greatly reduced, which is manifested by enhanced piezoelectricity and isotropic magnetic behaviors. A combination of techniques such as transmission electron microscopy, Raman spectroscopy and X-ray diffraction provide additional evidence of stress release in the as-prepared nanocomposite. Moreover, as a benefit of this unconstrained structure, we are able to observe a large magnetic-field-induced polarization change of up to 11.5% at room temperature, demonstrating its potential application in future magnetoelectronic devices at the nanoscale.
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01-internacional
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MEDLINE
Idioma:
En
Ano de publicação:
2013
Tipo de documento:
Article