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Dielectric properties characterization of La- and Dy-doped BiFeO3 thin films

  • Peter Kr. Petrov (a1), Vaijayanti R. Palkar (a2), Alexander K Tagantsev (a3), Hsin-I Chien (a4), K. Prashanthi (a5), Anna-Karin Axelsson (a1), S. Bhattacharya (a2) and Neil McN Alford (a1)...

The dielectric response of La- and Dy- doped BiFeO3 thin films at microwave frequencies (up to 12 GHz) has been monitored as a function of frequency, direct current (dc) electric field, and magnetic field in a temperature range from 25 to 300 °C. Both the real and imaginary parts of the response have been found to be non-monotonic (oscillating) functions of measuring frequency. These oscillations are not particularly sensitive to a dc electric field; however, they are substantially dampened by a magnetic field. The same effect has been observed when the volume of the characterized sample is increased. This phenomenon is attributed to the presence of a limited number of structural features with a resonance type response. The exact origin of these features is unknown at present. Leakage current investigations were performed on the whole set of films. The films were highly resistive with low leakage current, thereby giving us confidence in the microwave measurements. These typically revealed ‘N’-type I-V characteristics.

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1 G.A. Smolenski : Ferroelectromagnets. Sov. Phys. Usp. 25, 4751982

2 V.R. Palkar , J. John R. Pinto : Observation of saturated polarization and dielectric anomaly in magnetoelectric BiFeO3 thin films. Appl. Phys. Lett. 80, 16282002

3 S. Shetty , V.R. Palkar R. Pinto : BiFeO3 thin films: Novel effects. PRAMANA-J. Phys. 58, 10272002

4 D. Lee , M.G. Kim , S. Ryu , H.M. Jang S.G. Lee : Epitaxially grown La-modified BiFeO3 magnetoferroelectric thin films. Appl. Phys. Lett. 86, 2229032005

5 P.K. Petrov , N.McN. Alford S. Gevorgyan : Techniques for microwave measurements of ferroelectric thin films and their associated error and limitations. Meas. Sci. Technol. 16, 5832005

6 B. Spivak , F. Zhou M.T. Beal Monod : Mesoscopic mechanisms of the photovoltaic effect and microwave absorption in granular metals. Phys. Rev. B: Condens. Matter 51, 132261995

8 O.G. Vendik , S.P. Zubko M.A. Nikol’ski : Modeling and calculation of the capacitance of a planar capacitor containing a ferroelectric thin film. Tech. Phys. 44, 3491999

10 A.K. Tagantsev , V.O. Sherman , K.F. Astafiev , J. Venkatesh N. Setter : Ferroelectric materials for microwave tunable applications. J. Electroceram. 11, 52003

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Journal of Materials Research
  • ISSN: 0884-2914
  • EISSN: 2044-5326
  • URL: /core/journals/journal-of-materials-research
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