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C W Chu - One of the best experts on this subject based on the ideXlab platform.

  • Magnetoelectric Effect and spontaneous polarization in hofe 3 bo 3 4 and ho 0 5 nd 0 5 fe 3 bo 3 4
    Physical Review B, 2009
    Co-Authors: R P Chaudhury, Fei Yen, Bernd Lorenz, Y Y Sun, L N Bezmaternykh, V L Temerov, C W Chu
    Abstract:

    The thermodynamic, magnetic, dielectric, and Magnetoelectric properties of ${\text{HoFe}}_{3}{({\text{BO}}_{3})}_{4}$ and ${\text{Ho}}_{0.5}{\text{Nd}}_{0.5}{\text{Fe}}_{3}{({\text{BO}}_{3})}_{4}$ are investigated. Both compounds show a second order Ne\'el transition above 30 K and a first-order spin reorientation transition below 10 K. ${\text{HoFe}}_{3}{({\text{BO}}_{3})}_{4}$ develops a spontaneous electrical polarization below the Ne\'el temperature $({T}_{N})$ which is diminished in external magnetic fields. No magnetic-field induced increase of the polarization could be observed in ${\text{HoFe}}_{3}{({\text{BO}}_{3})}_{4}$. In contrast, the solid solution ${\text{Ho}}_{0.5}{\text{Nd}}_{0.5}{\text{Fe}}_{3}{({\text{BO}}_{3})}_{4}$ exhibits both, a spontaneous polarization below ${T}_{N}$ and a positive Magnetoelectric Effect at higher fields that extends to high temperatures. The superposition of spontaneous polarization, induced by the internal magnetic field in the ordered state, and the Magnetoelectric polarizations due to the external field results in a complex behavior of the total polarization measured as a function of temperature and field.

  • Magnetoelectric Effect and spontaneous polarization in hofe 3 bo 3 4 and ho 0 5 nd 0 5 fe 3 bo 3 4
    Physical Review B, 2009
    Co-Authors: R P Chaudhury, Fei Yen, Bernd Lorenz, Y Y Sun, L N Bezmaternykh, V L Temerov, C W Chu
    Abstract:

    The thermodynamic, magnetic, dielectric, and Magnetoelectric properties of HoFe$_3$(BO$_3$)$_4$ and Ho$_{0.5}$Nd$_{0.5}$Fe$_3$(BO$_3$)$_4$ are investigated. Both compounds show a second order Ne\'{e}l transition above 30 K and a first order spin reorientation transition below 10 K. HoFe$_3$(BO$_3$)$_4$ develops a spontaneous electrical polarization below the Ne\'{e}l temperature (T$_N$) which is diminished in external magnetic fields. No Magnetoelectric Effect could be observed in HoFe$_3$(BO$_3$)$_4$. In contrast, the solid solution Ho$_{0.5}$Nd$_{0.5}$Fe$_3$(BO$_3$)$_4$ exhibits both, a spontaneous polarization below T$_N$ and a Magnetoelectric Effect at higher fields that extends to high temperatures. The superposition of spontaneous polarization, induced by the internal magnetic field in the ordered state, and the Magnetoelectric polarizations due to the external field results in a complex behavior of the total polarization measured as a function of temperature and field.

Ce-wen Nan - One of the best experts on this subject based on the ideXlab platform.

  • multiferroic heterostructures integrating ferroelectric and magnetic materials
    Advanced Materials, 2016
    Co-Authors: Longqing Chen, Ce-wen Nan
    Abstract:

    Multiferroic heterostructures can be synthesized by integrating monolithic ferroelectric and magnetic materials, with interfacial coupling between electric polarization and magnetization, through the exchange of elastic, electric, and magnetic energy. Although the nature of the interfaces remains to be unraveled, such cross coupling can be utilized to manipulate the magnetization (or polarization) with an electric (or magnetic) field, known as a converse (or direct) Magnetoelectric Effect. It can be exploited to significantly improve the performance of or/and add new functionalities to many existing or emerging devices such as memory devices, tunable microwave devices, sensors, etc. The exciting technological potential, along with the rich physical phenomena at the interface, has sparked intensive research on multiferroic heterostructures for more than a decade. Here, we summarize the most recent progresses in the fundamental principles and potential applications of the interface-based Magnetoelectric Effect in multiferroic heterostructures, and present our perspectives on some key issues that require further study in order to realize their practical device applications.

  • giant Magnetoelectric Effect in multiferroic laminated composites
    Physical Review B, 2005
    Co-Authors: Yuanhua Lin, Junyi Zhai, Gang Liu, Ning Cai, Ce-wen Nan
    Abstract:

    Multiferroic laminated composites consisting of Terfenol-$D$/polyvinylidene-fluoride (PVDF) and lead-zirconate titanate (PZT)/PVDF particulate composite layers were prepared by a simple hot-molding technique. Magnetoelectric coefficients are characterized for the different measuring angles between the directions of polarization and applied magnetic field and at various frequencies. The results indicate that the three-phase laminated composites exhibit remarkable Magnetoelectric Effect especially at the resonance frequency at which the electromechanical resonance appears. The maximum Magnetoelectric sensitivity of such composites is about $6\phantom{\rule{0.3em}{0ex}}\mathrm{V}∕\mathrm{cm}\phantom{\rule{0.2em}{0ex}}\mathrm{Oe}$ at about $90\phantom{\rule{0.3em}{0ex}}\mathrm{kHz}$.

  • calculations of giant Magnetoelectric Effect in multiferroic composites of rare earth iron alloys and pzt by finite element method
    International Journal of Solids and Structures, 2004
    Co-Authors: Gang Liu, Ce-wen Nan, Ning Cai, Yuanhua Lin
    Abstract:

    Abstract Magnetoelectric Effect of laminated composites of rare-earth-iron alloys (Terfenol-D) and lead–zirconate–titanate (PZT) is calculated by using finite element method. The dependences of the Magnetoelectric response on the geometric configuration, the orientations of magnetostriction and polarization, and the applied magnetic field are presented for various sandwiched composites in details. The giant Magnetoelectric Effect predicted for the Terfenol-D/PZT composites is in agreement with predictions by a recent analytical method and recent experimental observations available.

  • dependence of giant Magnetoelectric Effect on interfacial bonding for multiferroic laminated composites of rare earth iron alloys and lead zirconate titanate
    Journal of Applied Physics, 2004
    Co-Authors: Gang Liu, Ce-wen Nan, Ning Cai, Yuanhua Lin
    Abstract:

    The giant Magnetoelectric Effect of laminated composites of rare-earth-iron alloys (Terfenol-D) and lead–zirconate–titanate (PZT) is calculated by using the finite element method. Our simulations show that the Magnetoelectric response of the laminated Terfenol-D/PZT composites is strongly dependent on interfacial bonding between Terfenol-D and PZT layers. The giant Magnetoelectric Effect and its dependence on the interfacial bonding predicted by the finite element method for the composites are in good agreement with predictions by a recent analytical method and recent experimental observations available.

  • possible giant Magnetoelectric Effect of ferromagnetic rare earth iron alloys filled ferroelectric polymers
    Applied Physics Letters, 2001
    Co-Authors: Ce-wen Nan, Xiqiao Feng
    Abstract:

    Coupled magnetic–mechanical–electric Effects in a composite with ferromagnetic rare-earth–iron alloys (e.g., Tb1−xDyxFe2) filled in ferroelectric polymers [e.g, poly(vinylidene-fluoride–trifluoroethylene) copolymer] are studied by using the Green’s function technique. Numerical results suggest a possible giant linear Magnetoelectric Effect in the ferroic polymer–matrix composite, which is markedly larger than that in the best-known Magnetoelectric materials. In addition, the mechanically flexible composite exhibits large magnetostriction. The present results may stimulate further interest in the area of Magnetoelectric materials for technological applications.

Y Tokura - One of the best experts on this subject based on the ideXlab platform.

  • role of commensurability of spin order for optical Magnetoelectric Effect with electromagnons in multiferroic ymn 2 o 5
    Physical Review B, 2017
    Co-Authors: R Masuda, Yoshio Kaneko, Yuichi Yamasaki, Y Tokura, Y Takahashi
    Abstract:

    Multiferroic phases of materials like YM${}_{2}$O${}_{5}$ feature an optical Magnetoelectric Effect on the resonance of the electromagnon. The Effect manifests itself in nonreciprocal directional dichroism. Here, the authors examine the role of the commensurability of noncollinear spin order for the optical Magnetoelectric Effect for two types of electromagnon. For the electromagnon driven by the exchange striction, the crucial role of the commensurability is indicated by the suppression of the directional dichroism by the magnetic phase transition. On the other hand, the gapped electromagnon due to the spin-current mechanism is identified by the directional dichroism, regardless of (in)commensurability. These results provide new insights into the light-matter interaction driven by dynamical Magnetoelectric coupling.

  • doping tunable ferrimagnetic phase with large linear Magnetoelectric Effect in a polar magnet fe 2 mo 3 o 8
    Physical Review X, 2015
    Co-Authors: Takashi Kurumaji, Y Tokura, Shintaro Ishiwata
    Abstract:

    Novel electronic devices of the future may rely on the Magnetoelectric Effect, which researchers now show can be controlled in a $3d$ transition metal via Zn doping.

  • optical Magnetoelectric Effect in the polar gafeo3 ferrimagnet
    Physical Review Letters, 2004
    Co-Authors: J H Jung, Y Tokura, Masahiko Matsubara, T Arima, Y Kaneko
    Abstract:

    The optical Magnetoelectric (ME) Effect, i.e., the change of optical absorption upon the reversal of the light propagation direction, has been investigated for a polar ferrimagnet GaFeO3. For dipole- and spin-forbidden d-d transition bands located at 1.2-2.3 eV, a clear signal of the optical ME Effect (Deltaalphat approximately 3x10(-3)) is observed with an applied magnetic field as low as 500 Oe and a sample thickness (t) of 50 microm. The observation of a large ME Effect in the present compound suggests a possible route to magnification of this novel phenomenon for application.

R P Chaudhury - One of the best experts on this subject based on the ideXlab platform.

  • Magnetoelectric Effect and spontaneous polarization in hofe 3 bo 3 4 and ho 0 5 nd 0 5 fe 3 bo 3 4
    Physical Review B, 2009
    Co-Authors: R P Chaudhury, Fei Yen, Bernd Lorenz, Y Y Sun, L N Bezmaternykh, V L Temerov, C W Chu
    Abstract:

    The thermodynamic, magnetic, dielectric, and Magnetoelectric properties of ${\text{HoFe}}_{3}{({\text{BO}}_{3})}_{4}$ and ${\text{Ho}}_{0.5}{\text{Nd}}_{0.5}{\text{Fe}}_{3}{({\text{BO}}_{3})}_{4}$ are investigated. Both compounds show a second order Ne\'el transition above 30 K and a first-order spin reorientation transition below 10 K. ${\text{HoFe}}_{3}{({\text{BO}}_{3})}_{4}$ develops a spontaneous electrical polarization below the Ne\'el temperature $({T}_{N})$ which is diminished in external magnetic fields. No magnetic-field induced increase of the polarization could be observed in ${\text{HoFe}}_{3}{({\text{BO}}_{3})}_{4}$. In contrast, the solid solution ${\text{Ho}}_{0.5}{\text{Nd}}_{0.5}{\text{Fe}}_{3}{({\text{BO}}_{3})}_{4}$ exhibits both, a spontaneous polarization below ${T}_{N}$ and a positive Magnetoelectric Effect at higher fields that extends to high temperatures. The superposition of spontaneous polarization, induced by the internal magnetic field in the ordered state, and the Magnetoelectric polarizations due to the external field results in a complex behavior of the total polarization measured as a function of temperature and field.

  • Magnetoelectric Effect and spontaneous polarization in hofe 3 bo 3 4 and ho 0 5 nd 0 5 fe 3 bo 3 4
    Physical Review B, 2009
    Co-Authors: R P Chaudhury, Fei Yen, Bernd Lorenz, Y Y Sun, L N Bezmaternykh, V L Temerov, C W Chu
    Abstract:

    The thermodynamic, magnetic, dielectric, and Magnetoelectric properties of HoFe$_3$(BO$_3$)$_4$ and Ho$_{0.5}$Nd$_{0.5}$Fe$_3$(BO$_3$)$_4$ are investigated. Both compounds show a second order Ne\'{e}l transition above 30 K and a first order spin reorientation transition below 10 K. HoFe$_3$(BO$_3$)$_4$ develops a spontaneous electrical polarization below the Ne\'{e}l temperature (T$_N$) which is diminished in external magnetic fields. No Magnetoelectric Effect could be observed in HoFe$_3$(BO$_3$)$_4$. In contrast, the solid solution Ho$_{0.5}$Nd$_{0.5}$Fe$_3$(BO$_3$)$_4$ exhibits both, a spontaneous polarization below T$_N$ and a Magnetoelectric Effect at higher fields that extends to high temperatures. The superposition of spontaneous polarization, induced by the internal magnetic field in the ordered state, and the Magnetoelectric polarizations due to the external field results in a complex behavior of the total polarization measured as a function of temperature and field.

Jing Wang - One of the best experts on this subject based on the ideXlab platform.

  • topological axion states in the magnetic insulator mnbi_ 2 te_ 4 with the quantized Magnetoelectric Effect
    Physical Review Letters, 2019
    Co-Authors: D Zhang, D Y Xing, Haijun Zhang, Jing Wang
    Abstract:

    : Topological states of quantum matter have attracted great attention in condensed matter physics and materials science. The study of time-reversal-invariant topological states in quantum materials has made tremendous progress. However, the study of magnetic topological states falls much behind due to the complex magnetic structures. Here, we predict the tetradymite-type compound MnBi_{2}Te_{4} and its related materials host topologically nontrivial magnetic states. The magnetic ground state of MnBi_{2}Te_{4} is an antiferromagetic topological insulator state with a large topologically nontrivial energy gap (∼0.2  eV). It presents the axion state, which has gapped bulk and surface states, and the quantized topological Magnetoelectric Effect. The ferromagnetic phase of MnBi_{2}Te_{4} might lead to a minimal ideal Weyl semimetal.

  • nanoscale control of stripe ordered magnetic domain walls by vertical spin transfer torque in la0 67sr0 33mno3 film
    Applied Physics Letters, 2018
    Co-Authors: Jing Wang, Shizhe Wu, Chuanshou Wang, Iftikhar Ahmed Malik, Yuelin Zhang, Jinxing Zhang
    Abstract:

    Stripe-ordered domains with perpendicular magnetic anisotropy have been intensively investigated due to their potential applications in high-density magnetic data-storage devices. However, the conventional control methods (e.g., epitaxial strain, local heating, magnetic field, and Magnetoelectric Effect) of the stripe-ordered domain walls either cannot meet the demands for miniaturization and low power consumption of spintronic devices or require high strength of the electric field due to the small value of the Magnetoelectric Effect at room temperature. Here, a domain-wall resistive Effect of 0.1% was clarified in La0.67Sr0.33MnO3 thin films between the configurations of current in the plane and perpendicular to the plane of walls. Furthermore, a reversible nanoscale control of the domain-wall re-orientation by vertical spin transfer torque across the probe/film interface was achieved, where a probe voltage of 0.1 V was applied on a manganite-based capacitor. We also demonstrated that the stripe-ordered ...

  • quantized topological Magnetoelectric Effect of the zero plateau quantum anomalous hall state
    Physical Review B, 2015
    Co-Authors: Jing Wang, Biao Lian, Shoucheng Zhang
    Abstract:

    The topological Magnetoelectric Effect in a three-dimensional topological insulator is a novel phenomenon, where an electric field induces a magnetic field in the same direction, with a universal coefficient of proportionality quantized in units of $e²/2h$. Here in this paper, we propose that the topological Magnetoelectric Effect can be realized in the zero-plateau quantum anomalous Hall state of magnetic topological insulators or a ferromagnet-topological insulator heterostructure. The finite-size Effect is also studied numerically, where the Magnetoelectric coefficient is shown to converge to a quantized value when the thickness of the topological insulator film increases. We further propose a device setup to eliminate nontopological contributions from the side surface.