Structural, vibrational, and enhanced magneto-electric coupling in Ho-substituted BiFeO3
- Authors
- Muneeswaran, Muniyandi; Lee, Seung Hoon; Kim, Dong Hun; Jung, Beon Sung; Chang, Seo Hyoung; Jang, Jae-Won; Choi, Byung Chun; Jeong, Jung Hyun; Giridharan, N. V.; Venkateswaran, C.
- Issue Date
- Jun-2018
- Publisher
- Elsevier BV
- Keywords
- X-ray diffraction; Structural phase transition; Raman spectroscopy; Magneto-electric coupling
- Citation
- Journal of Alloys and Compounds, v.750, pp 276 - 285
- Pages
- 10
- Journal Title
- Journal of Alloys and Compounds
- Volume
- 750
- Start Page
- 276
- End Page
- 285
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/2048
- DOI
- 10.1016/j.jallcom.2018.03.365
- ISSN
- 0925-8388
1873-4669
- Abstract
- The effect of Holmium (Ho) substitution in BiFeO3 [Bi1-xHoxFeO3 (x= 0.00, 0.05, 0.10, 0.15, 0.18, and 0.20)] ceramics is reported. The X-ray diffraction study shows composition-driven rhombohedral-to-orthorhombic (R3c to Pnma) phase transition for Bi1-xHoxFeO3 (x = 0.15, 0.18, and 0.20) which is confirmed by Reitveld refinement. Raman spectra of Bi1-xHoxFeO3 (x = 0.00, 0.05, and 0.10) belong to the rhombohedral (R3c) structure. Further increasing the Ho3+ concentration in a BiFeO3 (BFO) system revealed that Raman modes of Bi1-xHoxFeO3 (x = 0.15, 0.18 and 0.20) were assigned to an orthorhombic (puma) structure, which is confirmed by the Rietveld analysis of X-ray diffraction data and TEM analysis. Ferroelectric studies show that the remnant polarization (Pr) gradually decreases for Bi1-xHoxFeO3 (x = 0.15, 0.18, and 0.20), confirming the transformation from polar to non-polar systems. Magnetic measurement shows ferromagnetic behavior observed for Bi1-xHoxFeO3 (x = 0.10 and 0.20) samples. Further, the magneto-electric coupling is measured in terms of magneto-capacitance of Ho3+-substituted BiFeO3 samples. (C) 2018 Elsevier B.V. All rights reserved.
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Collections - College of Natural Sciences > Department of Physics > 1. Journal Articles
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