Induced magnetism and magnetoelectric coupling in ferroelectric BaTiO3 by Cr-doping synthesized by a facile chemical route
IR@NPL: CSIR-National Physical Laboratory, New Delhi
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| Title |
Induced magnetism and magnetoelectric coupling in ferroelectric BaTiO3 by Cr-doping synthesized by a facile chemical route
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| Creator |
Shah, Jyoti
Kotnala, Ravinder K. |
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| Subject |
Physical Chemistry
Energy Fuels Materials Science |
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| Description |
Pure phase barium titanate (BTO) and Cr doped BTO have been synthesized by a facile single step metal-organic decomposition (MOD) method. Thermal gravimetric analysis (TGA) is performed on the processed sample to analyse the thermal stability of the compound. A tetragonal to distorted cubic phase transformation of BTO by Cr doping has been confirmed by X-ray diffraction and Raman spectroscopy. Cr doping in BTO reduced the ferroelectric transition temperature from 122 degrees C to 108 degrees C. A ferroelectric polarization value of 14.5 mu C cm(-2) for pure BTO was obtained, which decreased to 3.7 mu C cm(-2) by 1.5 Cr doping. The diamagnetism of BTO partially transformed into ferromagnetic behaviour by Cr-doping at the expense of a decrease in polarization. The magnetoelectric coefficient has been measured by the dynamic MEB method which was recorded as 13 mV cm(-1) Oe(-1) for 1.5 Cr : BTO at room temperature. Induced electric polarization has been obtained by applying an external magnetic field due to the local interaction of d electron spins with disordered electric dipoles via oxygen vacancies created by the Cr doping in BaTiO3. Such materials possess immense potential in low energy consumption for miniaturized device applications in the area of spintronics, sensors and transducers and multistage memory.
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| Publisher |
Royal Society of Chemistry
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| Date |
2013
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://npl.csircentral.net/3172/1/Induced%20magnetism%20and%20magnetoelectric.pdf
Shah, Jyoti and Kotnala, Ravinder K. (2013) Induced magnetism and magnetoelectric coupling in ferroelectric BaTiO3 by Cr-doping synthesized by a facile chemical route. Journal of Materials Chemistry A, 1 (30). pp. 8601-8608. ISSN 2050-7488 |
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| Relation |
http://npl.csircentral.net/3172/
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