Role of oxygen vacancies in deciding the high temperature magnetic properties of Ba and Sm substituted BiFeO 3 ceramics

Zhang, N.; Yang, Yanwei; Su, J.; Guo, Dong; Liu, X.N.; Ma, Ning; Liu, Z.M.; Zhao, Mingyu; Li, X.T.; Guo, Yongquan; Chang, Fanggao; Liu, J.-M.

doi:10.1016/j.jallcom.2016.03.262

Cited by 14 publications

(7 citation statements)

References 36 publications

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“…The oxygen vacancies in the perovskite structures can control the shifting of AFM transition temperature. 44,45 The hypothesis is that the lower is the number of oxygen vacancies, the higher is the magnetic ordering temperature of the perovskite. 44,45 The AFM transition temperature of BFO nanoparticles is ∼669 K, indicated by the arrow (Figure 6b), which is consistent with a previous study.…”

Section: Resultsmentioning

confidence: 99%

“…44,45 The hypothesis is that the lower is the number of oxygen vacancies, the higher is the magnetic ordering temperature of the perovskite. 44,45 The AFM transition temperature of BFO nanoparticles is ∼669 K, indicated by the arrow (Figure 6b), which is consistent with a previous study. 17 BHFO-(5, 10, and 15) exhibits two transition peaks: the first transition temperature is ∼637 K, and the second temperature is >700 K. The major transition temperature at 669 K has shifted to higher temperatures with the Ho substitution (Figure S11), indicating that BHFO samples with lower oxygen vacancies (as derived from Figures 3f and 5a) have maximum ∼40 K higher AFM temperature compared to BFO.…”

Section: Resultsmentioning

confidence: 99%

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Vacancy-Induced Temperature-Dependent Thermal and Magnetic Properties of Holmium-Substituted Bismuth Ferrite Nanoparticle Compacts

Islam

Zubair

Galib

et al. 2022

ACS Appl. Mater. Interfaces

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Multiferroics have gained widespread acceptance for room-temperature applications such as in spintronics, ferroelectric random access memory, and transistors because of their intrinsic magnetic and ferroelectric coupling. However, a comprehensive study, establishing a correlation between the magnetic and thermal transport properties of multiferroics, is still missing from the literature. To fill the void, this work reports the temperature-dependent thermal and magnetic properties of holmium-substituted bismuth ferrite (BiFeO 3 ) and their dependencies on oxygen vacancies and structural modifications. Two distinct magnetic transitions on temperature-dependent magnetic and heat capacity responses are identified. Experimental analysis suggests that the excess of oxygen vacancies shifts the magnetic transition temperature by ∼64 K. The holmium substitution-induced structural modification increases BiFeO 3 heat capacity by 30% up to the antiferromagnetic phase transition temperature. Furthermore, an unsaturated heat capacity even at temperatures as high as 850 K is observed and is ascribed to anharmonicity and partial densification of the nanoparticles used during heat capacity measurements. The room-temperature thermal conductivity of BiFeO 3 is ∼0.33 ± 0.11 W m −1 K −1 and remains unchanged at high temperatures due to defect scattering from porosities.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Vacancy-Induced Temperature-Dependent Thermal and Magnetic Properties of Holmium-Substituted Bismuth Ferrite Nanoparticle Compacts

Islam

Zubair

Galib

et al. 2022

ACS Appl. Mater. Interfaces

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“…Even though these BFO thin films are oxygen stoichiometric, we note that controlling and manipulating defects is an alternative to modify and design the spin structure and magnetism of BFO as well as of multiferroic perovskites. [ 38–41 ]…”

Section: Resultsmentioning

confidence: 99%

Photonic‐Crafting of Non‐Volatile and Rewritable Antiferromagnetic Spin Textures with Drastic Difference in Electrical Conductivity

Kuo

Liou

et al. 2022

Advanced Materials

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Figure 3. Non-contact optical writing of the designed AFM pattern. a) Schematic of the designed pattern composed of the two distinct AFM configurations written by laser illumination. b) The XAS spectra mapping taken by measuring I A /I B , where the I A(B) is the intensity of the spectra taken at the energy A(B) for E//b as marked in Figure 3c and Figure 3d. c,d) The XAS polarization-dependent spectra for E//a and E//b taken at point 1 inside the word "BFO" (c) and at point 2 outside the word "BFO" (d)

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“…Aliovalent doping is also used to gain control over oxygen vacancies in intrinsic or artificial multiferroics. Co‐doping strategies not only allow the formation of oxygen vacancies to be suppressed, which, as defects, promote unwanted leakage current, but also favor structural distortion, which enhances the magnetic and ferroelectric properties as reported for Eu, Sr, and Ba, and BiFeO 3 co‐doped with Sm …”

Section: Composite Multiferroicsmentioning

confidence: 95%

The Role of Interfaces in Heterostructures

Bärtsch

Niederberger

2017

ChemPlusChem

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Nanocomposites represent an interesting class of materials because their applications are of multidisciplinary importance. Herein, interactions at the interface of heterostructures, leading to superior performance and sometimes to synergistic interactions, are highlighted. Although the types of junctions seem to be similar in different fields, the requirements for their function is device‐dependent and thus no generally valid recipe can be utilized. Nonetheless, the overlap between research fields unveils the unique opportunity to combine the different knowledge and expertise as an inspiration to designing new composites for photoelectrochemical water splitting, photocatalysis, chemoresistive sensors, batteries, and composite multiferroics. A non‐comprehensive overview is provided with focus on selected examples to highlight the concepts behind these nanojunctions.

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Role of oxygen vacancies in deciding the high temperature magnetic properties of Ba and Sm substituted BiFeO 3 ceramics

Cited by 14 publications

References 36 publications

Vacancy-Induced Temperature-Dependent Thermal and Magnetic Properties of Holmium-Substituted Bismuth Ferrite Nanoparticle Compacts

Vacancy-Induced Temperature-Dependent Thermal and Magnetic Properties of Holmium-Substituted Bismuth Ferrite Nanoparticle Compacts

Photonic‐Crafting of Non‐Volatile and Rewritable Antiferromagnetic Spin Textures with Drastic Difference in Electrical Conductivity

The Role of Interfaces in Heterostructures

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