Orientation dependence of magnetoelectric coefficient in 1-3–type BaTiO3/CoFe2O4

Jian, Gang; Shao, Hui; Zhang, Cheng; Yan, Chao‐Guo; Zhao, Nian; Song, Bo; Wong, C.P.

doi:10.1016/j.jmmm.2017.10.046

Cited by 15 publications

(3 citation statements)

References 20 publications

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“…The values of these parameters along arbitrary orientations were given in this study (some are listed in Table 1), which provides precise predictions for values of parameters with changing orientations. Table 1 also indicates that as a lead-free piezoelectric material, BiFeO 3 has smaller elastic stiffnesses (larger elastic compliances) than tetragonal BaTiO 3 , and it has piezoelectric constants in the same level with those of KNbO 3 [32,33]. Furthermore, the largest values of these parameters were given in this study, which shows applications for the growth of BiFeO 3 films with oriented structure and enhanced properties.…”

Section: Resultsmentioning

confidence: 54%

Orientation Dependence of Elastic and Piezoelectric Properties in Rhombohedral BiFeO3

et al. 2018

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Through a coordinate transformation approach, crystal orientation dependences of elastic and piezoelectric properties at room temperature have been investigated in a three-dimensional space for rhombohedral bismuth ferrite (BiFeO3). Elastic constants (stiffnesses) c11′, c12′, c13′ and piezoelectric constants d15′, d31′, d33′ along arbitrary orientations were obtained based on crystalline asymmetry characteristics of 3m point group BiFeO3. Parameters along specific orientations obtaining the largest values were presented. The max c11′ = 213 × 109 N/m2 could be achieved in planes with ϕ = 0° and 90°. The max c12′ = c13′ = 132.2 × 109 N/m2 could be achieved along directions at θ = 13° and θ = 77° inside three mirror planes, respectively. The max d15′ = 27.6 × 10−12 C/N and the max d31′ = 12.67 × 10−12 C/N could be both obtained along directions at θ = 69° inside mirror planes. The max d33′ = 18 × 10−12 C/N could be obtained at θ = 0°, along the spontaneous polarization axis. By adopting optimal directions, the elastic and piezoelectric parameters of BiFeO3 could be significantly enhanced which shows applications for the growth of BeFeO3 films with preferred orientations and enhanced properties.

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Section: Resultsmentioning

confidence: 54%

Orientation Dependence of Elastic and Piezoelectric Properties in Rhombohedral BiFeO3

et al. 2018

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“…Moreover, the magnetic properties of the nanocomposite thin film having vertically aligned nanocomposite architecture or the 1-3 system are known to strongly correlate with the structures of the constituent phases . This phenomenon is verified not only for the BFO-CFO system but also for other 1-3 geometry materials such as the BTO-CFO system, wherein the crystal orientation of the constituent phases has been demonstrated to exhibit significant effects on the elastic and magnetoelectric properties of BTO-CFO nanocomposite thin films …”

Section: Resultsmentioning

confidence: 69%

“…21 This phenomenon is verified not only for the BFO-CFO system but also for other 1-3 geometry materials such as the BTO-CFO system, wherein the crystal orientation of the constituent phases has been demonstrated to exhibit significant effects on the elastic and magnetoelectric properties of BTO-CFO nanocomposite thin films. 62 To gain more insight into the magnetic properties of the embedded CFO mesocrystals, the temperature-dependent magnetization (M−T) measurement was conducted by SQUID, with an external magnetic field of 500 Oe applied along the in-plane direction. As shown in Figure 6(c,d), both CFO mesocrystals on STO and LAO substrates show a dramatic decrease in the zero-field-cooled (ZFC) magnetization curve as compared to the field-cooled (FC) curve starting from 300 K, indicating ferrimagnetic ordering existing above room temperature.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Preferentially Oriented Nanometer-Sized CoFe₂O₄ Mesocrystals Embedded in the BiFeO₃ Matrix for Opto-Magnetic Device Applications

Amrillah

Hermawan

Bitla

et al. 2021

ACS Appl. Nano Mater.

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CoFe 2 O 4 (CFO) mesocrystals were synthesized in the form of collectively connected nanosized grains with specific crystallographic orientations. Such CFO mesocrystals were found to exhibit distinctive magnetic and optical properties substantially deviating from those observed in conventional CFO single crystals or in a system composed of randomly distributed nanocrystals. In this study, the magnetic and optical properties of CFO mesocrystals having the geometry of rectangular and triangularshaped islands were extensively investigated. The magnetic strength and anisotropy behavior of rectangular CFO mesocrystals are larger than the triangular ones embedded in the BiFeO 3 (BFO) matrix. The result indicates that the orientation of CFO mesocrystals and the magnetic exchange interactions at the CFO-BFO vertical interfaces are important to tune the magnetic properties of CFO mesocrystals. The strain states among the two constituent phases and the substrate also exhibited significant variations in the oxygen vacancy concentration, which in turn plays a determinate role in the optical behavior of the samples. The CFO mesocrystals embedded in rhombohedrally structured BFO matrix having Fe 3+ /Fe 2+ ratio of 1.71 had a slightly smaller band gap than those embedded in a tetragonally structured BFO matrix with Fe 3+ /Fe 2+ ratio of 2.52. The present study demonstrates an intriguing pathway for exploring new opportunities based on a functional CFO mesocrystal-embedded system for practical applications in opto-magnetic-related devices such as magneto-photovoltaics, memory devices, and sensors.

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3D BaTiO₃ Flower Based Polymer Composites Exhibiting Excellent Piezoelectric Energy Harvesting Properties

Jian

Jiao

Meng

et al. 2020

Adv Materials Inter

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Piezoelectric nanogenerators (PENGs) with good flexibility and high outputs have promising applications in harvesting mechanical energy and powering electronics. In this study, a synthesis of hierarchical BaTiO3 flowers (BTFs) and their filling into the polydimethylsiloxane (PDMS) matrix to obtain composites with excellent energy harvesting properties is reported. The BTF‐based PENG possesses a voltage of 260 V, a current of 50 µA, and a power of 1728 µW under a compression of 50 N at 3.5 Hz, which output power is two orders higher than that of polymer composites filled with BT nanoparticles. Simulation indicates that the high local stress at petals of BTFs is the main reason for the enhanced performances. The PENG shows good durability under 5000 cycles and lights up 58 commercial light emitting diodes and a display. The PENG generates 30–100 V in harvesting human motions of hand slapping and foot stepping and ≈50 V in harvesting the sport kinetic energy of basketball bouncing. This research presents a BTF‐based PENG with significantly enhanced energy harvesting performances for applications in micro/nanoenergy systems.

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Orientation dependence of magnetoelectric coefficient in 1-3–type BaTiO3/CoFe2O4

Cited by 15 publications

References 20 publications

Orientation Dependence of Elastic and Piezoelectric Properties in Rhombohedral BiFeO3

Orientation Dependence of Elastic and Piezoelectric Properties in Rhombohedral BiFeO3

Preferentially Oriented Nanometer-Sized CoFe₂O₄ Mesocrystals Embedded in the BiFeO₃ Matrix for Opto-Magnetic Device Applications

3D BaTiO₃ Flower Based Polymer Composites Exhibiting Excellent Piezoelectric Energy Harvesting Properties

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Orientation dependence of magnetoelectric coefficient in 1-3–type BaTiO3/CoFe2O4

Cited by 15 publications

References 20 publications

Orientation Dependence of Elastic and Piezoelectric Properties in Rhombohedral BiFeO3

Orientation Dependence of Elastic and Piezoelectric Properties in Rhombohedral BiFeO3

Preferentially Oriented Nanometer-Sized CoFe2O4 Mesocrystals Embedded in the BiFeO3 Matrix for Opto-Magnetic Device Applications

3D BaTiO3 Flower Based Polymer Composites Exhibiting Excellent Piezoelectric Energy Harvesting Properties

Contact Info

Product

Resources

About

Preferentially Oriented Nanometer-Sized CoFe₂O₄ Mesocrystals Embedded in the BiFeO₃ Matrix for Opto-Magnetic Device Applications

3D BaTiO₃ Flower Based Polymer Composites Exhibiting Excellent Piezoelectric Energy Harvesting Properties