Pressure-induced transformations of multiferroic relaxor PbFe0.5Nb0.5O3

Basu, Abhisek; Ahart, Muhtar; Holtgrewe, Nicholas; Lin, Chuanlong; Hemley, Russell J.

doi:10.1063/1.5019485

Cited by 3 publications

(2 citation statements)

References 35 publications

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“…Recently, in-situ hydrostatic pressure is employed to dielectric property measurement of multiferroic oxides at variable temperatures [52][53][54][55][56]. Hydrostatic pressure is an effective perturbation to manipulate structural modifications and to alter interatomic distance of atomic arrangement, which would create new structural phases or influence the energy balance between the frustrated magnetic interactions through spin-lattice couplings, tune the magnetic competition and spin state and in turn create new magnetic phase [52][53][54][55][56][268][269][270][271][272][273][274][275]. Thus, in-situ hydrostatic pressure may induce and stabilize a series of new ferroelectric polar phases in type I multiferroic oxides [270] and some new spin-driven ferroelectric phases in type II multiferroic oxides [52-56, 268, 269, 271-275].…”

Section: Magnetic Order Transition and Charge Disorder-order Transitionmentioning

confidence: 99%

Dielectric phenomena of multiferroic oxides at acoustic- and radio-frequency

Yang

Bai

Zhang

et al. 2023

J. Phys.: Condens. Matter

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In this review, an overview of acoustic- and radio-frequency frequency dielectric properties of multiferroic oxides, the significant dynamic response of electrical polarization to small external ac electrical fields, are present based on the reports in literatures and our recent experimental progresses. The review is begun with some basic terms, concepts and mechanisms associated with dielectric response and dielectric anomalies, namely dielectric peak and plateau upon varying temperatures and dielectric relaxations upon varying frequencies. Subsequently, a variety of quantitative analyses and descriptions of various dielectric effects, including dielectric relaxation, relaxational and transport dynamics, ac conductivity, equivalent circuit models and impedance spectroscopy, are summarized in details. Next is the kernel section. We thoroughly outline various physical mechanisms behind acoustic-/radio-frequency dielectric responses and anomalies of multiferroic oxides. Spin order transition/spin rotation, charge disorder-order transition, exchange striction of the spin interactions, spin-dependent p-d hybridization mechanism, quantum electric-dipole liquids, the interaction of spin order and quantum paraelectric, the motions of charged defects and carriers, quasi-intrinsic and extrinsic heterogeneous interfaces, polar relaxor and multiglass, ferroic domain wall/boundary motions, etc, are involved in these mechanisms. Meanwhile, particular emphasis is placed on intrinsic or extrinsic magnetodielectric effects and related mechanisms in multiferroic oxides. Finally, the review ends with a short perspective of future dielectric research in multiferroic oxides. This review is able to provide the detailed and unique insights into abundant underlying fundamental physics in multiferroic oxides as well as the potential multiferroics-based technological applications.

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Section: Magnetic Order Transition and Charge Disorder-order Transitionmentioning

confidence: 99%

Dielectric phenomena of multiferroic oxides at acoustic- and radio-frequency

Yang

Bai

Zhang

et al. 2023

J. Phys.: Condens. Matter

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“…The interactions of photon and condensed material systems involve a variety of physical processes and result in diverse effects. [1][2][3][4] Among correlated material systems, intensive attention has been paid to the perovskite oxides due to their ferroelectricity, ferromagnetism, and optical nonlinearity arising from the strong couplings among charge, lattice, orbital, and spin degrees of freedom. [5][6][7][8] In this paper, we focus on the following three effects of the interactions between laser and perovskite oxides: the ionization and nucleation in laser molecular-beam epitaxy (laser-MBE), the nonlinear responses in the second harmonic generation (SHG) technique, and the photoelectronic effect in oxides.…”

Section: Introductionmentioning

confidence: 99%

Photon-interactions with perovskite oxides

et al. 2022

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Photons with variable energy, high coherency, and switchable polarization provide an ideal tool-kits for exploring the cutting-edge scientific questions in the condensed matter physics and materials sciences. Over decades, extensive researches in the sample fabrication and excitations have employed the photon as one of the important means to synthesize and explore the low-dimensional quantum materials. In this review, we firstly summarize the recent progresses of the state-of-the-art thin-film deposition methods using excimer pulsed laser, by which syntactic oxides with atomic-unit-cell-thick layers and extremely high crystalline quality can be programmatically fabricated. We demonstrate the artificially engineered oxide quantum heterostructures exhibit the unexpected physical properties which are absence in their parent forms. Secondly, we highlight the recent work on probing the symmetry breaking at the surface/interface and weak couplings among nanoscale ferroelectric domains using optical second harmonic generation. We clarify the current challenges in the in-situ characterizations under the external fields and large-scale imaging using optical second harmonic generation. The improvements in the sample quality and the non-contact detection technique further promote the understanding of the mechanism of the novel properties emerged at the interface and inspire the potential applications, such as the ferroelectric resistive memory and ultrahigh energy storage capacitors.

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Optical second-harmonic generation microscopy as a tool for ferroelastic domain wall exploration

Yokota

Uesu

2021

Journal of Applied Physics

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Domain walls (DWs) of four typical ferroelastics, CaTiO3 (CTO), LaAlO3 (LAO), Pb3(PO4)2 (PPO), and BiVO4 (BVO), were observed by the second harmonic generation (SHG) microscopy, and the results were compared. The DWs of the examined ferroelastics are all polar. This fact does not depend on whether the crystal is an insulator (CTO, LAO, and PPO) or a semiconductor (BVO), on whether it has ferroelectric instability (CTO) or not (LAO, PPO, and BVO), or on the DW state, namely, whether the DW is crystallographically prominent or non-prominent. The symmetry of these DWs was determined from the SHG anisotropy, and it was clarified that they are a subgroup of the high temperature phase. In the cases of CTO and PPO, stress was applied to move the DW, and its polarity and symmetry were examined. The main characteristics did not change even when stress was applied. In all samples, uniform SHG was observed for each DW. This indicates that the DWs of the examined ferroelastics seem to be in a ferroelectric single domain state.

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Pressure-induced transformations of multiferroic relaxor PbFe0.5Nb0.5O3

Cited by 3 publications

References 35 publications

Dielectric phenomena of multiferroic oxides at acoustic- and radio-frequency

Dielectric phenomena of multiferroic oxides at acoustic- and radio-frequency

Photon-interactions with perovskite oxides

Optical second-harmonic generation microscopy as a tool for ferroelastic domain wall exploration

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