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Indian Journal of Pure & Applied Physics (IJPAP) >
IJPAP Vol.49 [2011] >
IJPAP Vol.49(12) [December 2011] >
| Title: | Structural parameters and resistive switching phenomenon study on Cd0.25Co0.75Fe2O4 ferrite thin film |
| Authors: | Chhaya, U V
Mistry, B V
Bhavsar, K H
Gadhvi, M R
Lakhani, V K
Modi, K B
Joshi, U S |
| Keywords: | Ferrite thin film
Structural parameters
Electrical switching |
| Issue Date: | Dec-2011 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | Cadmium substituted
cobalt ferrite thin film with nominal composition Cd0.25Co0.75Fe2O4,
has been grown on quartz substrate by chemical solution deposition and their
structural and electrical properties have been investigated. Grazing incidence
X-ray diffraction (XRD) confirmed single phase spinel structure with nanometer
grain size. Atomic force microscopic analysis revealed uniform nano structured
growth of about 70 nm average crystallite size. The XRD data have been used to
determine the distribution of cations among the tetrahedral and octahedral
sites of the spinel lattice and various structural parameters. The cation
distribution determined from X-ray diffraction line intensity calculations
revealed, 60% octahedral sites occupancy of Cd2+-ions in the
composition. Four terminal I-V
measurements show hysteretic curves, suggesting high resistance state (HRS) and
low resistance state (LRS) in the film with polarity dependence. Maximum
resistance ratio, Rhigh/Rlow of 57% was observed at
room temperature in the Ag/Cd0.25Co0.75Fe2O4/Ag planar structure. Observed resistance
switching is attributed to combined effects, viz., in the LRS, the major
fraction of cadmium occupation and electron exchange between Fe3+
and Fe2+ at the B-sites, whereas the HRS shows Schottky-like
conduction mechanism at the Ag/Cd0.25Co0.75Fe2O4
interface. |
| Page(s): | 833-840 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-1041 (Online); 0019-5596 (Print) |
| Source: | IJPAP Vol.49(12) [December 2011]
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