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- Title
Magnetic and Magnetoelectric Properties of AurivilliusThree- and Four-Layered Intergrowth Ceramics.
- Authors
Veenachary, Vadla; Ramana, Eskilla Venkata; Babu, Simhachalam Narendra; Puli, Venkata Sreenivas; Srinivas, Adiraj; Srinivasan, Gopalan; Saha, Sujoy; Prasad, Guduru; Prasad, Nandiraju Venkata
- Abstract
In this work, we have prepared intergrowth of multiferroic compounds namely Bi4RTi3Fe0.7Co0.3O15-Bi3RTi2Fe0.7Co0.3O12−δ (BRTFCO15-BRTFCO12) (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: A21am). Analysis of magnetic measurements confirmed a larger magnetization for theSm-modified intergrowth compound (BSTFCO15-BSTFCO12) compared to Dy- and La-doped ones. The emergence of higher magnetic properties can be due to distortion in the unit cell when some Bi3+ ions are replaced with the Sm3+, bonding of Fe3+-O-Co3+ as well as a possible mixture of FexCoy-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.
- Subjects
MAGNETIC properties; MAGNETIC measurements; SPACE groups; MAGNETIC fields; RIETVELD refinement; SAMARIUM; RARE earth metals; MULTIFERROIC materials; CERAMICS
- Publication
Crystals (2073-4352), 2023, Vol 13, Issue 3, p426
- ISSN
2073-4352
- Publication type
Article
- DOI
10.3390/cryst13030426