Multiferroic Behavior in Composites of Nickel-Exchanged Glass Containing Nanoparticles of Barium Titanate
A multiferroic material has been synthesized by first growing BaTiO3 nanocrystals in a silica glass and then subjecting the composite to a two‐stage ion‐exchange reaction of the type Ti4+↔2Ni2+. The nanocomposite retained the usual ferroelectric characteristics with lower values of the dielectric co...
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| Veröffentlicht in: | Journal of the American Ceramic Society 2011-09, Vol.94 (9), p.3006-3011 |
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| container_issue | 9 |
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| container_title | Journal of the American Ceramic Society |
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| creator | Naidu, R. Venkata Ram Hajra, Partha Datta, Anindya Bhattacharya, Santanu Chakravorty, Dipankar |
| description | A multiferroic material has been synthesized by first growing BaTiO3 nanocrystals in a silica glass and then subjecting the composite to a two‐stage ion‐exchange reaction of the type Ti4+↔2Ni2+. The nanocomposite retained the usual ferroelectric characteristics with lower values of the dielectric constant and remanent polarization. It also showed ferromagnetic hysteresis at temperatures in the range 10–300 K. At temperatures below ∼10 K, the magnetization exhibited a sharp increase as the temperature was reduced. This has been explained on the basis of a one‐dimensional Heisenberg ferromagnet consisting of Ni2+ ions at the surfaces of the nanocrystals. The nanocomposite showed magnetodielectric coupling at room temperature. The dielectric constant increased as a function of magnetic field, showing a maximum at 4 kOe. This has been ascribed to magnetostriction of the new BaTiO3 nanocrystalline phase. |
| doi_str_mv | 10.1111/j.1551-2916.2011.04490.x |
| format | Article |
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Venkata Ram</creatorcontrib><creatorcontrib>Hajra, Partha</creatorcontrib><creatorcontrib>Datta, Anindya</creatorcontrib><creatorcontrib>Bhattacharya, Santanu</creatorcontrib><creatorcontrib>Chakravorty, Dipankar</creatorcontrib><collection>Istex</collection><collection>CrossRef</collection><collection>Ceramic Abstracts</collection><collection>Engineered Materials Abstracts</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Journal of the American Ceramic Society</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Naidu, R. 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At temperatures below ∼10 K, the magnetization exhibited a sharp increase as the temperature was reduced. This has been explained on the basis of a one‐dimensional Heisenberg ferromagnet consisting of Ni2+ ions at the surfaces of the nanocrystals. The nanocomposite showed magnetodielectric coupling at room temperature. The dielectric constant increased as a function of magnetic field, showing a maximum at 4 kOe. This has been ascribed to magnetostriction of the new BaTiO3 nanocrystalline phase.</abstract><cop>Malden, USA</cop><pub>Blackwell Publishing Inc</pub><doi>10.1111/j.1551-2916.2011.04490.x</doi><tpages>6</tpages></addata></record> |
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| issn | 0002-7820 1551-2916 |
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| source | Wiley Online Library - AutoHoldings Journals |
| subjects | Barium titanates Dielectric constant Ferromagnetism Glass Magnetic fields Nanocomposites Nanocrystals Nanomaterials Nanostructure Silica glass Temperature effects |
| title | Multiferroic Behavior in Composites of Nickel-Exchanged Glass Containing Nanoparticles of Barium Titanate |
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