Strain induced giant magnetoelectric coupling in KNN/Metglas/KNN sandwich multilayers
| Autor: | M. R. Anantharaman, Ajith S. Kumar, K. Venkata Saravanan, S. Vivek, C.S. Chitra Lekha, Swapna S. Nair |
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| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Coupling Materials science Physics and Astronomy (miscellaneous) Condensed matter physics Resonance Magnetostriction 02 engineering and technology Dielectric 021001 nanoscience & nanotechnology 01 natural sciences Ferroelectricity Piezoelectricity Nuclear magnetic resonance 0103 physical sciences Metglas 0210 nano-technology Coupling coefficient of resonators |
| Zdroj: | Applied Physics Letters. 110:012901 |
| ISSN: | 1077-3118 0003-6951 |
| Popis: | A lead-free magnetoelectric composite with sandwich layers of K0.5Na0.5NbO3 (KNN)/Co76Fe14Ni4Si5B (Metglas)/KNN is fabricated as a cantilever and it is characterized for its magnetic, ferroelectric, and magnetoelectric properties. Giant magnetoelectric (ME) coupling is recorded under both resonant and sub resonant conditions and the data are presented here. The observed magnetoelectric coupling coefficient reaches a maximum of 1321 V/cm Oe at resonance (750 Hz) and 9.5 V/cm Oe at a sub-resonant frequency of 50 Hz. The corresponding theoretical calculations are provided for comparison. High magnetostriction as well as initial permeability, fairly good piezoelectric properties, and low dielectric constant cumulatively contribute to the giant magnetoelectric properties in the present system. The high resonance and sub resonance ME coupling voltages make the system ideal for transducers and energy harvesting device applications. |
| Databáze: | OpenAIRE |
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