TY - JOUR
T1 - Structural, vibrational, and enhanced magneto-electric coupling in Ho-substituted BiFeO3
AU - Muneeswaran, Muniyandi
AU - Lee, Seung Hoon
AU - Kim, Dong Hun
AU - Jung, Beon Sung
AU - Chang, Seo Hyoung
AU - Jang, Jae Won
AU - Choi, Byung Chun
AU - Jeong, Jung Hyun
AU - Giridharan, N. V.
AU - Venkateswaran, C.
N1 - Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2018/6/25
Y1 - 2018/6/25
N2 - 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 (pnma) 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.
AB - 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 (pnma) 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.
KW - Magneto-electric coupling
KW - Raman spectroscopy
KW - Structural phase transition
KW - X-ray diffraction
UR - https://www.scopus.com/pages/publications/85044957062
U2 - 10.1016/j.jallcom.2018.03.365
DO - 10.1016/j.jallcom.2018.03.365
M3 - Article
AN - SCOPUS:85044957062
SN - 0925-8388
VL - 750
SP - 276
EP - 285
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
ER -