Enhanced magnetic and electrical properties of y and Mn co-doped BiFeO 3 nanoparticles

A. Mukherjee; M. Banerjee; S. Basu; Nguyen Thi Kim Thanh; L. A.W. Green; M. Pal

doi:10.1016/j.physb.2014.03.082

Enhanced magnetic and electrical properties of y and Mn co-doped BiFeO ₃ nanoparticles

A. Mukherjee, M. Banerjee, S. Basu, Nguyen Thi Kim Thanh, L. A.W. Green, M. Pal

Research output: Contribution to journal › Article › peer-review

56 Scopus citations

Abstract

Multiferroic (Y, Mn) substituted BiFeO₃ had been synthesized by a facial sol-gel method. The single phase polycrystalline nature of samples was confirmed from X-ray diffraction pattern. The average particle size was estimated to be around 30-32 nm from transmission electron microscopy. The magnetic properties of codoped nanoparticles had been studied using Bloch equation and the estimated value of the Bloch constant was found to be much larger than usual ferromagnetic materials. Coercivity values for different temperature is used to calculate the blocking temperature and found to lie above room temperature. The dc electrical transport properties were studied in the temperature range 298- 523 K and explained using a Motts 3D variable range hopping model and the density of states was estimated near the Fermi level. The ac electrical data were found to follow the correlated barrier hopping model. Well-developed PE hysteresis loops were observed in codoped nanoparticles, which were attributed to a decrease in oxygen vacancies, bismuth volatisation due to doping and an increase of the effective potential barrier height for charge carriers.

Original language	English
Pages (from-to)	199-203
Number of pages	5
Journal	Physica B: Condensed Matter
Volume	448
DOIs	https://doi.org/10.1016/j.physb.2014.03.082
State	Published - 1 Sep 2014
Externally published	Yes

Bibliographical note

Funding Information:
The authors would like to acknowledge ﬁnancial support from the Board of Research in Nuclear Science (BRNS) (Project no. 2011/37P/14/BRNS ), Government of India. The authors also acknowledge the Centre of Excellence in Advanced Material, NIT Durgapur. The authors would also like to thank Department of Science and Technology (DST) ( SR/FTP/PS-66/2008 ), Government of India for providing financial assistance. Ayan Mukherjee thanks Council for Scientific and Industrial Research for his Senior Research Fellowship.

Keywords

Bismuth ferrite
Correlated barrier hopping
Electrical properties
Magnetic properties
Multiferroics
Nanoparticles

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10.1016/j.physb.2014.03.082

Cite this

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title = "Enhanced magnetic and electrical properties of y and Mn co-doped BiFeO 3 nanoparticles",

abstract = "Multiferroic (Y, Mn) substituted BiFeO3 had been synthesized by a facial sol-gel method. The single phase polycrystalline nature of samples was confirmed from X-ray diffraction pattern. The average particle size was estimated to be around 30-32 nm from transmission electron microscopy. The magnetic properties of codoped nanoparticles had been studied using Bloch equation and the estimated value of the Bloch constant was found to be much larger than usual ferromagnetic materials. Coercivity values for different temperature is used to calculate the blocking temperature and found to lie above room temperature. The dc electrical transport properties were studied in the temperature range 298- 523 K and explained using a Motts 3D variable range hopping model and the density of states was estimated near the Fermi level. The ac electrical data were found to follow the correlated barrier hopping model. Well-developed PE hysteresis loops were observed in codoped nanoparticles, which were attributed to a decrease in oxygen vacancies, bismuth volatisation due to doping and an increase of the effective potential barrier height for charge carriers.",

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author = "A. Mukherjee and M. Banerjee and S. Basu and Thanh, {Nguyen Thi Kim} and Green, {L. A.W.} and M. Pal",

note = "Funding Information: The authors would like to acknowledge ﬁnancial support from the Board of Research in Nuclear Science (BRNS) (Project no. 2011/37P/14/BRNS ), Government of India. The authors also acknowledge the Centre of Excellence in Advanced Material, NIT Durgapur. The authors would also like to thank Department of Science and Technology (DST) ( SR/FTP/PS-66/2008 ), Government of India for providing financial assistance. Ayan Mukherjee thanks Council for Scientific and Industrial Research for his Senior Research Fellowship.",

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AU - Green, L. A.W.

AU - Pal, M.

N1 - Funding Information: The authors would like to acknowledge ﬁnancial support from the Board of Research in Nuclear Science (BRNS) (Project no. 2011/37P/14/BRNS ), Government of India. The authors also acknowledge the Centre of Excellence in Advanced Material, NIT Durgapur. The authors would also like to thank Department of Science and Technology (DST) ( SR/FTP/PS-66/2008 ), Government of India for providing financial assistance. Ayan Mukherjee thanks Council for Scientific and Industrial Research for his Senior Research Fellowship.

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N2 - Multiferroic (Y, Mn) substituted BiFeO3 had been synthesized by a facial sol-gel method. The single phase polycrystalline nature of samples was confirmed from X-ray diffraction pattern. The average particle size was estimated to be around 30-32 nm from transmission electron microscopy. The magnetic properties of codoped nanoparticles had been studied using Bloch equation and the estimated value of the Bloch constant was found to be much larger than usual ferromagnetic materials. Coercivity values for different temperature is used to calculate the blocking temperature and found to lie above room temperature. The dc electrical transport properties were studied in the temperature range 298- 523 K and explained using a Motts 3D variable range hopping model and the density of states was estimated near the Fermi level. The ac electrical data were found to follow the correlated barrier hopping model. Well-developed PE hysteresis loops were observed in codoped nanoparticles, which were attributed to a decrease in oxygen vacancies, bismuth volatisation due to doping and an increase of the effective potential barrier height for charge carriers.

AB - Multiferroic (Y, Mn) substituted BiFeO3 had been synthesized by a facial sol-gel method. The single phase polycrystalline nature of samples was confirmed from X-ray diffraction pattern. The average particle size was estimated to be around 30-32 nm from transmission electron microscopy. The magnetic properties of codoped nanoparticles had been studied using Bloch equation and the estimated value of the Bloch constant was found to be much larger than usual ferromagnetic materials. Coercivity values for different temperature is used to calculate the blocking temperature and found to lie above room temperature. The dc electrical transport properties were studied in the temperature range 298- 523 K and explained using a Motts 3D variable range hopping model and the density of states was estimated near the Fermi level. The ac electrical data were found to follow the correlated barrier hopping model. Well-developed PE hysteresis loops were observed in codoped nanoparticles, which were attributed to a decrease in oxygen vacancies, bismuth volatisation due to doping and an increase of the effective potential barrier height for charge carriers.

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