1 research outputs found
Tunable Strain in Magnetoelectric ZnO Microrod Composite Interfaces
The
intrinsic strain at coupled components in magnetoelectric composites
plays an important role for the properties and function of these materials.
In this in situ X-ray nanodiffraction experiment, the coating-induced
as well as the magnetic-field-induced strain at the coupled interface
of complex magnetoelectric microcomposites were investigated. These
consist of piezoelectric ZnO microrods coated with an amorphous layer
of magnetostrictive (Fe<sub>90</sub>Co<sub>10</sub>)<sub>78</sub>Si<sub>12</sub>B<sub>10</sub>. While the intrinsic strain is in the range
of 10<sup>–4</sup>, the magnetic-field-induced strain is within
10<sup>–5</sup>, one order of magnitude smaller. Additionally,
the strain relaxation distance of around 5 μm for both kinds
of strain superposes indicating a correlation. The value of both intrinsic
and magnetic-field-induced strain can be manipulated by the diameter
of the rodlike composite. The intrinsic interface strain within the
ZnO increases exponentially by decreasing the rod diameter while the
magnetic-field-induced strain increases linearly within the given
range. This study shows that miniaturizing has a huge impact on magnetoelectric
composite properties, resulting in a strongly enhanced strain field
and magnetic response