Magnetic and Magnetoelectric Properties of AurivilliusThree- and Four-Layered Intergrowth Ceramics
In this work, we have prepared intergrowth of multiferroic compounds namely Bi<sub>4</sub>RTi<sub>3</sub>Fe<sub>0.7</sub>Co<sub>0.3</sub>O<sub>15</sub>-Bi<sub>3</sub>RTi<sub>2</sub>Fe<sub>0.7</sub>Co<s...
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MDPI AG
2023-03-01
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| author | Vadla Veenachary Eskilla Venkata Ramana Simhachalam Narendra Babu Venkata Sreenivas Puli Adiraj Srinivas Gopalan Srinivasan Sujoy Saha Guduru Prasad Nandiraju Venkata Prasad |
| author_facet | Vadla Veenachary Eskilla Venkata Ramana Simhachalam Narendra Babu Venkata Sreenivas Puli Adiraj Srinivas Gopalan Srinivasan Sujoy Saha Guduru Prasad Nandiraju Venkata Prasad |
| author_sort | Vadla Veenachary |
| collection | DOAJ |
| description | In this work, we have prepared intergrowth of multiferroic compounds namely Bi<sub>4</sub>RTi<sub>3</sub>Fe<sub>0.7</sub>Co<sub>0.3</sub>O<sub>15</sub>-Bi<sub>3</sub>RTi<sub>2</sub>Fe<sub>0.7</sub>Co<sub>0.3</sub>O<sub>12−δ</sub> (BRTFCO<sub>15</sub>-BRTFCO<sub>12</sub>) (rare earth (R) = Dy, Sm, La) by solid-state reaction method. From the X-ray diffraction Rietveld refinement, the structure of the intergrowths was found to be orthorhombic in which satisfactory fittings establish the existence of three-layered (space group: b 2 c b) and four-layered compounds (space group: A2<sub>1</sub>am). Analysis of magnetic measurements confirmed a larger magnetization for theSm-modified intergrowth compound (BSTFCO<sub>15</sub>-BSTFCO<sub>12</sub>) compared to Dy- and La-doped ones. The emergence of higher magnetic properties can be due to distortion in the unit cell when some Bi<sup>3+</sup> ions are replaced with the Sm<sup>3+</sup>, bonding of Fe<sup>3+</sup>-O-Co<sup>3+</sup> as well as a possible mixture of Fe<sub>x</sub>Co<sub>y</sub>-type nanoparticles that are formed generally in the synthesis of intergrowths. The changes in the magnetic state of the Aurivillius intergrowths have been reflected in the magnetoelectric (ME) coupling: higher ME coefficient (~30 mV/Cm-Oe) at lower magnetic fields and is constant up to 3 kOe. The results were corroborated by Raman spectroscopy and variation of temperature with magnetization data. The results revealed that the RE-modified intergrowth route is an effective preparative method for higher-layer Aurivillius multiferroic ceramics. |
| first_indexed | 2024-03-11T06:43:09Z |
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| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-03-11T06:43:09Z |
| publishDate | 2023-03-01 |
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| spelling | doaj.art-cb7f1e58da1e4c92a3a6ff0eb5cf465f2023-11-17T10:28:36ZengMDPI AGCrystals2073-43522023-03-0113342610.3390/cryst13030426Magnetic and Magnetoelectric Properties of AurivilliusThree- and Four-Layered Intergrowth CeramicsVadla Veenachary0Eskilla Venkata Ramana1Simhachalam Narendra Babu2Venkata Sreenivas Puli3Adiraj Srinivas4Gopalan Srinivasan5Sujoy Saha6Guduru Prasad7Nandiraju Venkata Prasad8Materials Research Laboratory, Department of Physics, Osmania University, Hyderabad 500 007, IndiaI3N-Aveiro, Department of Physics, University of Aveiro, Aveiro-3810 193, PortugalMaterials Research Laboratory, Department of Physics, Osmania University, Hyderabad 500 007, IndiaSmart Nanomaterials Solutions, Orlando, FL 32707, USAAdvanced Magnetics Group, Defence Metallurgical Research Laboratory, Hyderabad 500 058, IndiaPhysics Department, Oakland University, Rochester, MI 48309, USAPhysics Department, Oakland University, Rochester, MI 48309, USAMaterials Research Laboratory, Department of Physics, Osmania University, Hyderabad 500 007, IndiaMaterials Research Laboratory, Department of Physics, Osmania University, Hyderabad 500 007, IndiaIn this work, we have prepared intergrowth of multiferroic compounds namely Bi<sub>4</sub>RTi<sub>3</sub>Fe<sub>0.7</sub>Co<sub>0.3</sub>O<sub>15</sub>-Bi<sub>3</sub>RTi<sub>2</sub>Fe<sub>0.7</sub>Co<sub>0.3</sub>O<sub>12−δ</sub> (BRTFCO<sub>15</sub>-BRTFCO<sub>12</sub>) (rare earth (R) = Dy, Sm, La) by solid-state reaction method. From the X-ray diffraction Rietveld refinement, the structure of the intergrowths was found to be orthorhombic in which satisfactory fittings establish the existence of three-layered (space group: b 2 c b) and four-layered compounds (space group: A2<sub>1</sub>am). Analysis of magnetic measurements confirmed a larger magnetization for theSm-modified intergrowth compound (BSTFCO<sub>15</sub>-BSTFCO<sub>12</sub>) compared to Dy- and La-doped ones. The emergence of higher magnetic properties can be due to distortion in the unit cell when some Bi<sup>3+</sup> ions are replaced with the Sm<sup>3+</sup>, bonding of Fe<sup>3+</sup>-O-Co<sup>3+</sup> as well as a possible mixture of Fe<sub>x</sub>Co<sub>y</sub>-type nanoparticles that are formed generally in the synthesis of intergrowths. The changes in the magnetic state of the Aurivillius intergrowths have been reflected in the magnetoelectric (ME) coupling: higher ME coefficient (~30 mV/Cm-Oe) at lower magnetic fields and is constant up to 3 kOe. The results were corroborated by Raman spectroscopy and variation of temperature with magnetization data. The results revealed that the RE-modified intergrowth route is an effective preparative method for higher-layer Aurivillius multiferroic ceramics.https://www.mdpi.com/2073-4352/13/3/426magnetoelectricmultiferroicaurivillius Intergrowth compoundsmagnetic studiesRaman spectroscopy |
| spellingShingle | Vadla Veenachary Eskilla Venkata Ramana Simhachalam Narendra Babu Venkata Sreenivas Puli Adiraj Srinivas Gopalan Srinivasan Sujoy Saha Guduru Prasad Nandiraju Venkata Prasad Magnetic and Magnetoelectric Properties of AurivilliusThree- and Four-Layered Intergrowth Ceramics Crystals magnetoelectric multiferroic aurivillius Intergrowth compounds magnetic studies Raman spectroscopy |
| title | Magnetic and Magnetoelectric Properties of AurivilliusThree- and Four-Layered Intergrowth Ceramics |
| title_full | Magnetic and Magnetoelectric Properties of AurivilliusThree- and Four-Layered Intergrowth Ceramics |
| title_fullStr | Magnetic and Magnetoelectric Properties of AurivilliusThree- and Four-Layered Intergrowth Ceramics |
| title_full_unstemmed | Magnetic and Magnetoelectric Properties of AurivilliusThree- and Four-Layered Intergrowth Ceramics |
| title_short | Magnetic and Magnetoelectric Properties of AurivilliusThree- and Four-Layered Intergrowth Ceramics |
| title_sort | magnetic and magnetoelectric properties of aurivilliusthree and four layered intergrowth ceramics |
| topic | magnetoelectric multiferroic aurivillius Intergrowth compounds magnetic studies Raman spectroscopy |
| url | https://www.mdpi.com/2073-4352/13/3/426 |
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