skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Electrical and magnetic properties of multiferroic BiFeO{sub 3}/CoFe{sub 2}O{sub 4} heterostructure

Abstract

To realize a magnetoelectric heterostructure with desired ferroelectric and magnetic properties, a heterostructure consisting of BiFeO{sub 3} (BFO)/CoFe{sub 2}O{sub 4} (CFO) layers has been grown on SrRuO{sub 3} buffered Pt/TiO{sub 2}/SiO{sub 2}/Si substrate by rf sputtering. X-ray diffraction shows that the BFO and CFO phases have been successfully retained in the heterostructure. Grain growth of the CFO phase was enhanced on top of the BFO layer. The heterostructure exhibits both ferroelectric and magnetic behaviors at room temperature. Its remanent polarization (2P{sub r}) is measured to be {approx}146 {mu}C/cm{sup 2} and the coercive field (2E{sub c}) is {approx}1803 kV/cm, while the saturation magnetization (2M{sub s}) is 140 emu/cm{sup 3} and the coercive field (2H{sub c}) is {approx}2.7 kOe. The leakage current behavior of the heterostructure is consistent with space charge limited conduction mechanism. While the heterostructure is promising for multiferroic behavior, it would be necessary to control the structural defects such that the leakage is minimized.

Authors:
;  [1];  [2]
  1. Department of Materials Science and Engineering, National University of Singapore, Singapore 117574 (Singapore)
  2. Division of Bioengineering, National University of Singapore, Singapore 117574 (Singapore)
Publication Date:
OSTI Identifier:
21137430
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 104; Journal Issue: 3; Other Information: DOI: 10.1063/1.2966696; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-8979
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; BISMUTH COMPOUNDS; COBALT OXIDES; DEPOSITION; FERROELECTRIC MATERIALS; GRAIN GROWTH; IRON COMPOUNDS; LAYERS; LEAKAGE CURRENT; MAGNETIC PROPERTIES; MAGNETIZATION; PLATINUM; POLARIZATION; SILICON OXIDES; SPACE CHARGE; SPUTTERING; SUBSTRATES; TEMPERATURE RANGE 0273-0400 K; TITANIUM OXIDES; X-RAY DIFFRACTION

Citation Formats

Zheng, R Y, Wang, J, and Ramakrishna, S. Electrical and magnetic properties of multiferroic BiFeO{sub 3}/CoFe{sub 2}O{sub 4} heterostructure. United States: N. p., 2008. Web. doi:10.1063/1.2966696.
Zheng, R Y, Wang, J, & Ramakrishna, S. Electrical and magnetic properties of multiferroic BiFeO{sub 3}/CoFe{sub 2}O{sub 4} heterostructure. United States. doi:10.1063/1.2966696.
Zheng, R Y, Wang, J, and Ramakrishna, S. Fri . "Electrical and magnetic properties of multiferroic BiFeO{sub 3}/CoFe{sub 2}O{sub 4} heterostructure". United States. doi:10.1063/1.2966696.
@article{osti_21137430,
title = {Electrical and magnetic properties of multiferroic BiFeO{sub 3}/CoFe{sub 2}O{sub 4} heterostructure},
author = {Zheng, R Y and Wang, J and Ramakrishna, S},
abstractNote = {To realize a magnetoelectric heterostructure with desired ferroelectric and magnetic properties, a heterostructure consisting of BiFeO{sub 3} (BFO)/CoFe{sub 2}O{sub 4} (CFO) layers has been grown on SrRuO{sub 3} buffered Pt/TiO{sub 2}/SiO{sub 2}/Si substrate by rf sputtering. X-ray diffraction shows that the BFO and CFO phases have been successfully retained in the heterostructure. Grain growth of the CFO phase was enhanced on top of the BFO layer. The heterostructure exhibits both ferroelectric and magnetic behaviors at room temperature. Its remanent polarization (2P{sub r}) is measured to be {approx}146 {mu}C/cm{sup 2} and the coercive field (2E{sub c}) is {approx}1803 kV/cm, while the saturation magnetization (2M{sub s}) is 140 emu/cm{sup 3} and the coercive field (2H{sub c}) is {approx}2.7 kOe. The leakage current behavior of the heterostructure is consistent with space charge limited conduction mechanism. While the heterostructure is promising for multiferroic behavior, it would be necessary to control the structural defects such that the leakage is minimized.},
doi = {10.1063/1.2966696},
journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 3,
volume = 104,
place = {United States},
year = {2008},
month = {8}
}