Structural, optical and electromagnetic properties of Bi1−xHoxFeO3 multiferroic materials

Minh, Nguyễn Văn; Quan, Nguyen Gia

doi:10.1016/j.jallcom.2010.12.033

Cited by 72 publications

(20 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The value of the optical band gap energy of the samples with x = 0.8 and 0.9 is consistent with previous report [22,32,33]. However, the optical band gap exhibits an increase at x = 0.7 (E g = 3.04 eV).…”

Section: Optical Propertiessupporting

confidence: 92%

Structural, optical and electrical properties of multiferroic BiFe1-xNixO3 ceramic

2019

View full text Add to dashboard Cite

BiFe 1−x Ni x O 3 (x = 0.7, 0.8 and 0.9) polycrystalline ceramics are synthesized by a solid-state reaction, and their structural, absorption, leakage current and electrical properties are investigated. The X-ray diffraction measurements show that the lattice parameter values increase with increasing the substitution of Ni 2+ ions for Fe 3+ ions. The optical absorption spectra indicate that the band gap energy increases with increasing Ni 2+ ions. Leakage currents are much decreased by about three orders of magnitude with increasing Ni ions. The J-E hysteresis was also investigated. Both real and imaginary dielectric constants are investigated as a function of both frequency and temperature. The room temperature dielectric measurement with a wide frequency range of 1 KHz-1 MHz reveals that the real and imaginary dielectric constants are decreased with increasing frequency of BiFe 1−x Ni x O 3 (x = 0.7, 0.8, 0.9) ceramics. The real and imaginary dielectric constants are found to be increased with temperature. The temperature dependence of ε′ and ε″ exhibits an anomaly which shifted to lower temperature with increasing Ni 2+. The anomaly indicates the possible existence of spin-glass states with Ni 2+ ion substitution in places of Fe 3+ ions.

show abstract

Section: Optical Propertiessupporting

confidence: 92%

Structural, optical and electrical properties of multiferroic BiFe1-xNixO3 ceramic

2019

View full text Add to dashboard Cite

show abstract

“…Experimentally, doping at both Bi-and Fe-site of BFO has been extensively studied. [18][19][20][21][22][23][24][25] For example, Ho-doping up to 10% on Bi-site was found to induce an abrupt change in the lattice parameters along with an improvement in the magnetization 19 while rare-earth (Sm, Gd, and Dy) doping at Bi-site results in structural phase transformation from rhombohedral to orthorhombic phase. 20 La-doping on Bi-site is known to reduce leakage current and results in significant improvement of P-E loop over undoped BFO.…”

Section: Introductionmentioning

confidence: 99%

Effect of isovalent non-magnetic Fe-site doping on the electronic structure and spontaneous polarization of BiFeO3

Singh

Roy

Garg

et al. 2015

Journal of Applied Physics

View full text Add to dashboard Cite

We report the results of our first-principles calculations on the effect of isovalent, non-magnetic, Al 3þ ion doping on the electronic structure and spontaneous polarization of multiferroic BiFeO 3 . Our calculations reveal that Al 3þ doping in BiFeO 3 results in the reduction of Fe-O-Fe bond angle, leading to the weakening of antiferromagnetic superexchange interaction, further substantiated by the reduction of exchange interaction constant with increasing doping level. Lowering of welldepth is suggestive of reduced switching potential and improved P-E loop with lowered coercivity. Chemical bonding analysis by electron localization function shows that cation-oxygen bonding is of mixed ionic-covalent character, with marginal increase in the covalent character with increasing doping concentration. Large spontaneous polarization of undoped BiFeO 3 is retained with lower doping level (6.25%), while for higher doping content (31.25%), the spontaneous polarization is reduced, primarily due to larger c/a ratio at higher doping level. V C 2015 AIP Publishing LLC.

show abstract

“…And, what is more, the addition of external dopants may as well be helpful to improve the magnetoelectric properties of the synthesized product. Thus, it has been described in the literature that rare earth dopants like La 3+ [52,53], Gd 3+ [52,54], Nd 3+ [52], Sm 3+ [52,55], Y 3+ [56], or Ho 3+ [57] may have the desired effect of stabilizing the BiFeO 3 phase and decreasing the amount of secondary phases when replacing some Bi 3+ cations in the A positions of the perovskite structure. However, these dopants may diminish the electric polarizability of the A positions [52,58,59], so alternatively the use of transition ions like Mn 3+ [60] or Ti 4+ [61][62][63] for substituting the Fe 3+ cations in B positions, has been recently proposed.…”

Section: Mixed Oxides Synthesismentioning

confidence: 99%

Synthesis, microstructure and properties of BiFeO<sub>3</sub>-based multiferroic materials: A review

Bernardo¹

2014

Bol. Soc. Esp. Ceram. Vidr.

View full text Add to dashboard Cite

Structural, optical and electromagnetic properties of Bi1−xHoxFeO3 multiferroic materials

Cited by 72 publications

References 22 publications

Structural, optical and electrical properties of multiferroic BiFe1-xNixO3 ceramic

Structural, optical and electrical properties of multiferroic BiFe1-xNixO3 ceramic

Effect of isovalent non-magnetic Fe-site doping on the electronic structure and spontaneous polarization of BiFeO3

Synthesis, microstructure and properties of BiFeO<sub>3</sub>-based multiferroic materials: A review

Contact Info

Product

Resources

About