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Direct measurements of field-induced strain in magnetoelectric composites by X-ray diffraction studies of forbidden reflections
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10.1063/1.4797490
/content/aip/journal/jap/113/12/10.1063/1.4797490
http://aip.metastore.ingenta.com/content/aip/journal/jap/113/12/10.1063/1.4797490
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Normalized magnetization loop measured by VSM for the Fe58Tb42/ZnO ME composite (circles). Magnetostriction λ obtained by the cantilever method (squares). The in-plane magnetic field was applied parallel to the direction of the cantilever.

Image of FIG. 2.
FIG. 2.

Reciprocal space scans of the (4–40) ZnO Bragg reflection normalized to maximum peak intensity at different positions d of the beam on the pure ZnO (red circles) (a) and the FeTb/ZnO (blue diamonds) sample (b)with a 10 μm beam size in the [001] direction. All the scans have been offset vertically for clarity. Gaussian fits to the data are shown (black lines). (c) Strain profiles measured on the (4–40) Bragg reflections along the [1–10] direction for pure ZnO (red circles) and FeTb/ZnO (blue diamonds) samples as a function of distance d from the ZnO surface or FeTb/ZnO interface, respectively. The insets show the schematic of the X-ray diffraction geometry: k i and k s are the wave vectors of the incoming and outgoing X-rays, respectively; d is the distance from the FeTb/ZnO interface or ZnO surface where the beam impinges on the sample.

Image of FIG. 3.
FIG. 3.

(a) Crystal structure of ZnO. (b) In-plane real space ZnO lattice geometry. a1 and a2 are the primitive vectors, while a11 is the sum of these vectors. The vectors in green dashed line show the new positions of atoms after a compression strain along [110] direction.

Image of FIG. 4.
FIG. 4.

Reciprocal space scans of the ZnO(3–31) forbidden Bragg reflection at different positions d of the beam on the pure ZnO (red circles) (a) and the FeTb/ZnO (blue diamonds) sample (b) with a beam size in [001] direction of 50 μm. All the scans have been offset vertically for clarity. Gaussian fits to the data are shown (black lines). (c) Strain calculated using Eq. (5) as a function of distance d to the ZnO surface or ZnO/FeTb interface, respectively, on the pure ZnO (red circles) and the FeTb/ZnO (blue diamonds) sample. The inset shows the integrated intensities deduced on pure ZnO (red circles) and FeTb/ZnO (blue diamonds) as a function of distance d to the ZnO surface or ZnO/FeTb interface, respectively.

Image of FIG. 5.
FIG. 5.

(a) Intensity of the ZnO(3–31) forbidden Bragg reflection as a function of the magnetic field (diamonds). (b) Plot of magnetic field induced strain along [1–10] as a function of magnetic field (circles). For comparison, the magnetostriction λ is shown in the same plot.

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/content/aip/journal/jap/113/12/10.1063/1.4797490
2013-03-27
2014-04-23
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Direct measurements of field-induced strain in magnetoelectric composites by X-ray diffraction studies of forbidden reflections
http://aip.metastore.ingenta.com/content/aip/journal/jap/113/12/10.1063/1.4797490
10.1063/1.4797490
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