Hostname: page-component-78c5997874-dh8gc Total loading time: 0 Render date: 2024-11-13T05:26:52.456Z Has data issue: false hasContentIssue false
  • English
  • Français

High aspect ratio free standing ZnO-magnetostrictive mesoscale cylindrical magnetoelectric core shell composite

Published online by Cambridge University Press:  12 April 2012

S. Kaps ,
Y. K. Mishra ,
V. Hrkac ,
H. Greve ,
L. Kienle ,
E. Quandt  and
R. Adelung
S. Kaps
Affiliation:
Functional Nanomaterials, Institute for Materials Science, University of Kiel, Kaiserstrasse 2, D-24143, Kiel, Germany
Y. K. Mishra
Affiliation:
Functional Nanomaterials, Institute for Materials Science, University of Kiel, Kaiserstrasse 2, D-24143, Kiel, Germany
V. Hrkac
Affiliation:
Synthesis and Real Structure, Institute for Materials Science, University of Kiel, Kaiserstrasse 2, D-24143, Kiel, Germany
H. Greve
Affiliation:
Inorganic Functional Materials, Institute for Materials Science, University of Kiel, Kaiserstrasse 2, D-24143, Kiel, Germany
L. Kienle
Affiliation:
Synthesis and Real Structure, Institute for Materials Science, University of Kiel, Kaiserstrasse 2, D-24143, Kiel, Germany
E. Quandt
Affiliation:
Inorganic Functional Materials, Institute for Materials Science, University of Kiel, Kaiserstrasse 2, D-24143, Kiel, Germany
R. Adelung*
Affiliation:
Functional Nanomaterials, Institute for Materials Science, University of Kiel, Kaiserstrasse 2, D-24143, Kiel, Germany
*
*Email: ra@tf.uni-kiel.de
Get access

Abstract

Optimizing magnetic field sensors made by piezoelectric-magnetostrictive composites is a trade off between several parameters. Whereas large structures will cause in principle high electrical currents the mechanical coupling will lead to shear losses and therefore limit the sensitivity of the sensor and make it impossible to measure small magnetic fields. In very small structures the shear losses will decrease but the imperfections in the interfaces become more important and the typically small currents will be disturbed by, e.g., surface conductivity of the piezoelectric material and are thus difficult to measure. The best compromise is a mesoscale sensor which has relatively small losses due to shearing but still high enough electrical currents to work as a good sensor. We will present a setup which allows the use free standing ZnO micro rods as piezoelectric core material which are surrounded by a magnetostrictive layer. Since no clamping is necessary the expansion and contraction of the material is not hindered by a matrix material. The tuning of the relative layer thicknesses can be easily optimized by changing the thickness of the magnetostrictive layer so that an optimum can be achieved for different ZnO micro rods. For the growth of the ZnO a newly developed process will be presented which allows the growth of a large variety of single crystals with different aspect ratios up to needles with several millimeters in length.

Keywords

nanostructuremagnetic propertiestransmission electron microscopy (TEM)
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1398: Symposium Q – Magnetoelectric Composites , 2012 , mrsf11-1398-q09-01
Copyright
Copyright © Materials Research Society 2012

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Engdhal, G., Handbook of Giant Magnetostrictive Materials, (Elsevier Science Publishers 2000) (ISBN: 978-0-12-238640-4)Google Scholar
2. Mori, K., Wuttig, M., Appl. Phys. Lett. 81, 100 (2002).Google Scholar
3. Dong, S. X.; Li, J.-F.; Viehland, D.: Ultrahigh magnetic field sensitivity in laminates of TERFENOL-D and Pb(Mg1/3Nb2/3)O3-PbTiO3 crystals, Appl. Phys. Lett. 83 (2003) 2265.Google Scholar
4. Greve, H., Woltermann, E., Jahns, R., Marauska, S., Wagner, B., Wuttig, M., Knöchel, R., Quandt, E., Appl. Phys. Lett. 97, 3497277 (2010).Google Scholar
5. Wang, Z. L., Mat. Sci. & Eng. R 64, 33 (2009).Google Scholar
6. Wagner, R. S., Ellis, W. C., Appl. Phys. Lett. 4, 89 (1964).Google Scholar
7. Jebril, S., Kuhlmann, H., Muller, S., Ronning, C., Kienle, L., Duppel, V., Mishra, Y. K., Adelung, R., Crystal Growth and Design 10, 2842–2846 (2010)Google Scholar
8. Adelung, R., Kaps, S., Mishra, Y. K., Claus, M., Preusse, T. and Wolpert, C., German Patent No. : WO2011116751, PCT/DE2011/000282, 29.09.2011.Google Scholar
9. Murphy, B. et al. ., (Manuscript under preparation).Google Scholar