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Dwight Viehland - One of the best experts on this subject based on the ideXlab platform.

  • geometry induced magnetoelectric effect enhancement and noise floor reduction in Metglas piezofiber sensors
    Applied Physics Letters, 2012
    Co-Authors: Yaojin Wang, Junqi Gao, Davresh Hasanyan, Dwight Viehland
    Abstract:

    The geometry-dependent magnetoelectric (ME) effect was theoretically and experimentally investigated for multi-push-pull mode Metglas/Pb(Zr,Ti)O3 sandwich-like laminates. Such structures hold promise for passive sensor applications. A geometry-induced significant enhancement in the ME coefficient and an effective reduction in the equivalent magnetic noise was observed due to an increase in the Metglas width fraction.

  • enhanced magnetoelectric effect in self stressed multi push pull mode Metglas pb zr ti o3 Metglas laminates
    Applied Physics Letters, 2012
    Co-Authors: Yaojin Wang, Junqi Gao, Dwight Viehland
    Abstract:

    Two methods to effectively induce self-stress on Metglas/Pb(Zr,Ti)O3/Metglas laminate are presented: (i) applying a dc magnetic field to the Metglas layers or (ii) applying a dc electric field to the core piezoelectric composites. An optimum self-stress enhances the magnetoelectric (ME) effect in the laminates. With a 20 Oe dc magnetic bias, the value of αME for the self-stressed laminate was enhanced to 31.4 V/cm · Oe, which was by a factor of 1.24× compared to the laminate without self-stress. Furthermore, the equivalent magnetic noise floor was reduced by the self-stress at low frequencies.

  • ultralow equivalent magnetic noise in a magnetoelectric Metglas mn doped pb mg1 3nb2 3 o3 pbtio3 heterostructure
    Applied Physics Letters, 2012
    Co-Authors: Yaojin Wang, Dwight Viehland, Junqi Gao, Ying Shen, Davresh Hasanyan, Haosu Luo
    Abstract:

    An ultralow equivalent magnetic noise of 6.2 pT/√Hz at 1 Hz was obtained in a bimorph heterostructure sensor unit consisting of longitudinal-magnetized Metglas layers and a transverse-poled 1 mol. % Mn-doped Pb(Mg1/3Nb2/3)O3-29PbTiO3 (PMN-PT) single crystal. Furthermore, the equivalent magnetic noise was ≤1 pT/√Hz at 10 Hz. Compared with previously reported multi-push-pull configuration Metglas/PMN-PT sensor units, the current heterostructure exhibits a higher magnetoelectric coefficient of 61.5 V/(cm × Oe), a similar equivalent magnetic noise at 1 Hz and a lower noise floor at several hertz range. The ultralow equivalent magnetic noise in this sensor unit is due to the low tangent loss and ultrahigh piezoelectric properties of Mn-doped PMN-PT single crystals.

  • improvement of magnetoelectric properties in Metglas pb mg1 3nb2 3 o3 pbtio3 laminates by poling optimization
    Journal of Alloys and Compounds, 2012
    Co-Authors: Yaojin Wang, Dwight Viehland, David Berry, David Gray, Junqi Gao, Haosu Luo
    Abstract:

    Abstract The dielectric and piezoelectric properties of 〈0 0 1〉-oriented Pb(Mg1/3Nb2/3)O3–PbTiO3 (PMN–PT) fibers and fiber-Kapton core composites were improved by controlling their poling process. An improved poling procedure was identified for the Metglas/PMN–PT sensors, by which sensors exhibited a 1.4× enhancement in the ME coefficient, a 1.6× times reduction in the equivalent magnetic noise floor and a 1.6× times increase in magnetic field sensitivity.

  • giant converse magnetoelectric effect in multi push pull mode Metglas pb zr ti o3 Metglas laminates
    Applied Physics Letters, 2012
    Co-Authors: Yaojin Wang, Davresh Hasanyan, Dwight Viehland
    Abstract:

    The converse magnetoelectric (CME) effect was investigated theoretically and experimentally for multi-push-pull mode Metglas/Pb(Zr,Ti)O3/Metglas laminates. The experimental and theoretical values of the CME coefficient (αB) exhibited similar trends. A large αB = 6.94 G/V was observed at 1 kHz under a dc magnetic bias of 11 Oe. At an electromechanical resonance frequency of 29.6 kHz, the laminate exhibited a giant value of αB = 79.5 G/V. These results show significantly enhanced CME effects in multi-push-pull mode laminates, compared to previously reported ones with different structures and materials.

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

  • piezoelectric single crystal and magnetostrictive Metglas composites linear and nonlinear magnetoelectric coupling
    Applied Physics Letters, 2014
    Co-Authors: Yaojin Wang, Peter Finkel, Dwight D Viehland
    Abstract:

    Both the linear (αV) and nonlinear (αV,n) magnetoelectric coefficients were systemically studied in laminated composites of Metglas and [001]-orientated piezoelectric single crystals of Pb(Mg1/3Nb2/3)O3-PbTiO3 (PMN-PT) and Mn-doped PMN-PT. The coefficients were close in value in both cases at quasistatic mode (i.e., 3.8 V/Oe relative to 3.5 V/Oe) and were enhanced by factors of ×18 (Metglas/PMN-PT) and ×32 (Metglas/Mn-doped PMN-PT) at the electromechanical resonance (EMR). The use of Mn-doped PMN-PT crystals results in a higher gain factor due to a larger mechanical quality factor (i.e., 20.9 relative to 40.6). Accordingly, both types of laminates had similar values of αV,n when modulated at 1 kHz, but Mn-doped PMN-PT ones had a higher value when modulated at the EMR.

  • high non linear magnetoelectric coefficient in Metglas pmn pt laminate composites under zero direct current magnetic bias
    Journal of Applied Physics, 2014
    Co-Authors: Ying Shen, Junqi Gao, Yaojin Wang, Dwight D Viehland
    Abstract:

    The non-linear magnetoelectric (ME) response of Metglas/PMN-PT based sandwiched ME laminate composites has been studied for various thicknesses of the magnetostrictive layer. A significant increase in the non-linear ME coefficient under zero direct current bias was observed with a decreased Metglas thickness ratio for a fixed number of Metglas layers of n = 2. The non-linear ME effect was further improved by driving the laminate at the electromagnetic resonant frequency. The approach offers the potential to modulate low frequency magnetic signals to higher frequencies, where the noise floor is much lower and the signal to noise ratio higher.

  • nonlinear magnetoelectric response of a Metglas piezofiber laminate to a high frequency bipolar ac magnetic field
    Applied Physics Letters, 2013
    Co-Authors: Yaojin Wang, Junqi Gao, Ying Shen, Dwight D Viehland
    Abstract:

    A nonlinear magnetoelectric (ME) response has been investigated in a Metglas/piezofiber laminate by applying a bipolar AC magnetic field (Hac) without a DC magnetic bias. The ME voltage (VME) was measured for various amplitudes of Hac of up to 9 Oe over the frequency (f) range 0.1 < f < 40 kHz. Compared to the linear ME behavior, an anomalous response to f and Hac was observed, which is believed to be associated with the Eddy-current loss in the Metglas layers. A frequency multiplication effect was also observed for VME, which was understood by Fourier analysis of the nonlinearity in the magnetostriction.

  • giant magnetoelectric effect in self biased laminates under zero magnetic field
    Applied Physics Letters, 2013
    Co-Authors: Menghui Li, Jiefang Li, Zhiguang Wang, Yaojin Wang, Dwight D Viehland
    Abstract:

    A giant magnetoelectric (ME) effect in self-biased annealed Metglas/Pb(Zr,Ti)O3/Metglas laminates under zero magnetic bias is reported. The remanent magnetization was increased by annealing Metglas, which generated an internal bias field. This shifted the M-H hysteresis loops, yielding large values for the ME voltage coefficient of αME = 12 V/cm·Oe and 380 V/cm·Oe at 1 kHz and electromechanical resonance under zero magnetic bias, respectively. This self-biased laminate is shown to have a high sensitivity to ac magnetic fields.

  • geometry induced magnetoelectric effect enhancement and noise floor reduction in Metglas piezofiber sensors
    Applied Physics Letters, 2012
    Co-Authors: Yaojin Wang, Junqi Gao, Davresh Hasanyan, Dwight Viehland
    Abstract:

    The geometry-dependent magnetoelectric (ME) effect was theoretically and experimentally investigated for multi-push-pull mode Metglas/Pb(Zr,Ti)O3 sandwich-like laminates. Such structures hold promise for passive sensor applications. A geometry-induced significant enhancement in the ME coefficient and an effective reduction in the equivalent magnetic noise was observed due to an increase in the Metglas width fraction.

Haosu Luo - One of the best experts on this subject based on the ideXlab platform.

  • high sensitive nonlinear modulation magnetoelectric magnetic sensors with a magnetostrictive Metglas structure based on bell shaped geometry
    Journal of Magnetism and Magnetic Materials, 2016
    Co-Authors: Jie Jiao, Cong Fang, Xiangyong Zhao, Haosu Luo
    Abstract:

    Abstract In this paper both linear and nonlinear magnetoelectric (ME) effects have been investigated intensively. In order to obtain magnetic amplification, we fabricated 3 multi-push–pull mode magnetoelectric laminated composites Metglas/PMNT/Metglas based on dumbbell-shaped Metglas. The linear magnetoelectric charge coefficient is enhanced to 2600 pC/Oe at 2 Hz based on dumbbell-shaped Metglas and it increases as the end-flange width of the dumbbell-shaped Metglas increases at 2 Hz, respectively. Based on these 3 ME composites, we establish an active mode nonlinear modulation system for ME magnetic sensor, the sensitivity of which are enhanced to 80, 100 and 102 pT / √ Hz at 1 Hz for the composites with the end-flange width 20, 15 and 10 mm, respectively, via nonlinear ME　modulation method. Strain distribution simulations illustrate the theoretically accurate amplification of the dumbbell-shaped geometry. The center strains of 3 dumbbell-shaped Metglas decrease as the width of end-flanges decreases

  • significant reduction of equivalent magnetic noise by in plane series connection in magnetoelectric Metglas mn doped pb mg1 3nb2 3 o3 pbtio3 laminate composites
    Journal of Physics D, 2015
    Co-Authors: Cong Fang, Jie Jiao, Xiangyong Zhao, Di Lin, Haosu Luo
    Abstract:

    In this work, we investigated the magnetoelectric (ME) coefficients and equivalent magnetic noises of Metglas/Mn-doped Pb(Mg1/3Nb2/3)O3-PbTiO3 (PMNT) laminate composites with an in-plane series connected structure. An average-field method as well as a finite element simulation are employed to analyze the variation of the ME coefficients of a number of Mn-doped PMNT fibers (N). Both the theoretical and experimental results verify that the equivalent magnetic noises (EMNs) decrease obviously with an increasing N. Using this structure, the measured EMN of the Metglas/Mn-PMNT composite is as low as 0.87pT/Hz1/2 at 30Hz for N = 7, which is 1.8 times lower than that for N = 1. Such a low EMN holds considerable promise for practical ME magnetic sensors.

  • ultrahigh magnetoelectric voltage coefficients in laminates of Metglas and length polarized ternary 0 35pb in1 2nb1 2 o3 0 35pb mg1 3nb2 3 o3 0 3pbtio3 single crystals
    Sensors and Actuators A-physical, 2015
    Co-Authors: Cong Fang, Jie Jiao, Xiangyong Zhao, Di Lin, Haosu Luo
    Abstract:

    Abstract In this paper, a magnetoelectric laminate composite based on length magnetized Metglas and length-polarized ternary 0.35Pb(In 1/2 Nb 1/2 )O 3 –0.35Pb(Mg 1/3 Nb 2/3 )O 3 –0.30PbTiO 3 (PIMNT) single crystal has been presented. This Metglas/PIMNT L–L mode composite exhibits ultrahigh magnetoelectric voltage coefficients of ∼17 V/Oe at quasi-static frequency and of ∼147 V/Oe at resonance frequency, which are much larger than other magnetoelectric composites reported so far. Analysis of magnetic field sensitivity indicates that the estimated noise equivalent magnetic induction of the proposed composite is as low as 8.6 pT/Hz 1/2 @1 Hz. Due to its giant magnetoelectric voltage coefficients, the maximum magnetic-field-energy-harvesting output power reaches 29.2 mW/Oe 2 , which is about 3.65 times than that of previously reported Metglas/PMNT multi-push–pull mode composite. Accordingly, the proposed Metglas/PIMNT L–L mode composite shows promising applications in magnetic field detection sensors as well as transducers for magnetic field energy harvesting.

  • influence of Metglas layer on nonlinear magnetoelectric effect for magnetic field detection by frequency modulation
    Journal of Applied Physics, 2015
    Co-Authors: Jie Jiao, Cong Fang, Xiangyong Zhao, Haiwu Zhang, Yuting Liu, Di Lin, Haosu Luo
    Abstract:

    Linear magnetoelectric (ME) and nonlinear magnetoelectric effects are considered systematically in this paper. We have prepared 3 multi-push-pull magnetoelectric laminated composites Metglas/PMNT/Metglas with n layers Metglas (n = 1, 2, and 3). When n increases from 1 to 3, the linear magnetoelectric charge coefficients increase from 1900 to 2200 and then to 2600 pC/Oe at 2 Hz under their each optimal magnetic bias. By using these 3 ME composites, we have also prepared 3 ME sensors, the sensitivity of which are as low as 130, 168, and 199 pT/√Hz at 1 Hz for n = 1, 2, and 3, respectively, via nonlinear modulation method. Therefore, the nonlinear ME charge coefficients decrease as layer numbers of Metglas increase, which is different with the ME charge linear coefficient's increasing trend, also demonstrated coupled with the finite element analysis method. The factors that result in the higher nonlinear ME charge coefficient in ME composites with fewer Metglas layers are analyzed and discussed in detail.

  • ultralow equivalent magnetic noise in a magnetoelectric Metglas mn doped pb mg1 3nb2 3 o3 pbtio3 heterostructure
    Applied Physics Letters, 2012
    Co-Authors: Yaojin Wang, Dwight Viehland, Junqi Gao, Ying Shen, Davresh Hasanyan, Haosu Luo
    Abstract:

    An ultralow equivalent magnetic noise of 6.2 pT/√Hz at 1 Hz was obtained in a bimorph heterostructure sensor unit consisting of longitudinal-magnetized Metglas layers and a transverse-poled 1 mol. % Mn-doped Pb(Mg1/3Nb2/3)O3-29PbTiO3 (PMN-PT) single crystal. Furthermore, the equivalent magnetic noise was ≤1 pT/√Hz at 10 Hz. Compared with previously reported multi-push-pull configuration Metglas/PMN-PT sensor units, the current heterostructure exhibits a higher magnetoelectric coefficient of 61.5 V/(cm × Oe), a similar equivalent magnetic noise at 1 Hz and a lower noise floor at several hertz range. The ultralow equivalent magnetic noise in this sensor unit is due to the low tangent loss and ultrahigh piezoelectric properties of Mn-doped PMN-PT single crystals.

Junqi Gao - One of the best experts on this subject based on the ideXlab platform.

  • high non linear magnetoelectric coefficient in Metglas pmn pt laminate composites under zero direct current magnetic bias
    Journal of Applied Physics, 2014
    Co-Authors: Ying Shen, Junqi Gao, Yaojin Wang, Dwight D Viehland
    Abstract:

    The non-linear magnetoelectric (ME) response of Metglas/PMN-PT based sandwiched ME laminate composites has been studied for various thicknesses of the magnetostrictive layer. A significant increase in the non-linear ME coefficient under zero direct current bias was observed with a decreased Metglas thickness ratio for a fixed number of Metglas layers of n = 2. The non-linear ME effect was further improved by driving the laminate at the electromagnetic resonant frequency. The approach offers the potential to modulate low frequency magnetic signals to higher frequencies, where the noise floor is much lower and the signal to noise ratio higher.

  • nonlinear magnetoelectric response of a Metglas piezofiber laminate to a high frequency bipolar ac magnetic field
    Applied Physics Letters, 2013
    Co-Authors: Yaojin Wang, Junqi Gao, Ying Shen, Dwight D Viehland
    Abstract:

    A nonlinear magnetoelectric (ME) response has been investigated in a Metglas/piezofiber laminate by applying a bipolar AC magnetic field (Hac) without a DC magnetic bias. The ME voltage (VME) was measured for various amplitudes of Hac of up to 9 Oe over the frequency (f) range 0.1 < f < 40 kHz. Compared to the linear ME behavior, an anomalous response to f and Hac was observed, which is believed to be associated with the Eddy-current loss in the Metglas layers. A frequency multiplication effect was also observed for VME, which was understood by Fourier analysis of the nonlinearity in the magnetostriction.

  • geometry induced magnetoelectric effect enhancement and noise floor reduction in Metglas piezofiber sensors
    Applied Physics Letters, 2012
    Co-Authors: Yaojin Wang, Junqi Gao, Davresh Hasanyan, Dwight Viehland
    Abstract:

    The geometry-dependent magnetoelectric (ME) effect was theoretically and experimentally investigated for multi-push-pull mode Metglas/Pb(Zr,Ti)O3 sandwich-like laminates. Such structures hold promise for passive sensor applications. A geometry-induced significant enhancement in the ME coefficient and an effective reduction in the equivalent magnetic noise was observed due to an increase in the Metglas width fraction.

  • enhanced magnetoelectric effect in self stressed multi push pull mode Metglas pb zr ti o3 Metglas laminates
    Applied Physics Letters, 2012
    Co-Authors: Yaojin Wang, Junqi Gao, Dwight Viehland
    Abstract:

    Two methods to effectively induce self-stress on Metglas/Pb(Zr,Ti)O3/Metglas laminate are presented: (i) applying a dc magnetic field to the Metglas layers or (ii) applying a dc electric field to the core piezoelectric composites. An optimum self-stress enhances the magnetoelectric (ME) effect in the laminates. With a 20 Oe dc magnetic bias, the value of αME for the self-stressed laminate was enhanced to 31.4 V/cm · Oe, which was by a factor of 1.24× compared to the laminate without self-stress. Furthermore, the equivalent magnetic noise floor was reduced by the self-stress at low frequencies.

  • ultralow equivalent magnetic noise in a magnetoelectric Metglas mn doped pb mg1 3nb2 3 o3 pbtio3 heterostructure
    Applied Physics Letters, 2012
    Co-Authors: Yaojin Wang, Dwight Viehland, Junqi Gao, Ying Shen, Davresh Hasanyan, Haosu Luo
    Abstract:

    An ultralow equivalent magnetic noise of 6.2 pT/√Hz at 1 Hz was obtained in a bimorph heterostructure sensor unit consisting of longitudinal-magnetized Metglas layers and a transverse-poled 1 mol. % Mn-doped Pb(Mg1/3Nb2/3)O3-29PbTiO3 (PMN-PT) single crystal. Furthermore, the equivalent magnetic noise was ≤1 pT/√Hz at 10 Hz. Compared with previously reported multi-push-pull configuration Metglas/PMN-PT sensor units, the current heterostructure exhibits a higher magnetoelectric coefficient of 61.5 V/(cm × Oe), a similar equivalent magnetic noise at 1 Hz and a lower noise floor at several hertz range. The ultralow equivalent magnetic noise in this sensor unit is due to the low tangent loss and ultrahigh piezoelectric properties of Mn-doped PMN-PT single crystals.

Dwight D Viehland - One of the best experts on this subject based on the ideXlab platform.

  • enhanced tunability of magneto impedance and magneto capacitance in annealed Metglas pzt magnetoelectric composites
    AIP Advances, 2018
    Co-Authors: Chung Ming Leung, Xin Zhuang, G Srinivasan, Jitao Zhang, Dwight D Viehland
    Abstract:

    This report is on a new class of magnetostatically tunable magneto-impedance and magneto-capacitance devices based on a composite of ferromagnetic Metglas and ferroelectric lead zirconate titanate (PZT). Layered magneto-electric (ME) composites with annealed Metglas and PZT were studied in a longitudinal in-plane magnetic field-transverse electric field (L-T) mode. It was found that the degree of tunability was dependent on the annealing temperature of Metglas. An impedance tunability (ΔZ/Z0) of ≥400% was obtained at the electromechanical resonance (EMR) frequency (fr) for a sample with Metglas layers annealed at Ta = 500oC. This tunability is a factor of two higher than for composites with Metglas annealed at 350oC. The tunability of the capacitance, (ΔC/C0), was found to be 290% and -135k% at resonance and antiresonance, respectively, for Ta = 500oC. These results provide clear evidence for improvement in static magnetic field tunability of impedance and capacitance of ME composites with the use of anne...

  • piezoelectric single crystal and magnetostrictive Metglas composites linear and nonlinear magnetoelectric coupling
    Applied Physics Letters, 2014
    Co-Authors: Yaojin Wang, Peter Finkel, Dwight D Viehland
    Abstract:

    Both the linear (αV) and nonlinear (αV,n) magnetoelectric coefficients were systemically studied in laminated composites of Metglas and [001]-orientated piezoelectric single crystals of Pb(Mg1/3Nb2/3)O3-PbTiO3 (PMN-PT) and Mn-doped PMN-PT. The coefficients were close in value in both cases at quasistatic mode (i.e., 3.8 V/Oe relative to 3.5 V/Oe) and were enhanced by factors of ×18 (Metglas/PMN-PT) and ×32 (Metglas/Mn-doped PMN-PT) at the electromechanical resonance (EMR). The use of Mn-doped PMN-PT crystals results in a higher gain factor due to a larger mechanical quality factor (i.e., 20.9 relative to 40.6). Accordingly, both types of laminates had similar values of αV,n when modulated at 1 kHz, but Mn-doped PMN-PT ones had a higher value when modulated at the EMR.

  • high non linear magnetoelectric coefficient in Metglas pmn pt laminate composites under zero direct current magnetic bias
    Journal of Applied Physics, 2014
    Co-Authors: Ying Shen, Junqi Gao, Yaojin Wang, Dwight D Viehland
    Abstract:

    The non-linear magnetoelectric (ME) response of Metglas/PMN-PT based sandwiched ME laminate composites has been studied for various thicknesses of the magnetostrictive layer. A significant increase in the non-linear ME coefficient under zero direct current bias was observed with a decreased Metglas thickness ratio for a fixed number of Metglas layers of n = 2. The non-linear ME effect was further improved by driving the laminate at the electromagnetic resonant frequency. The approach offers the potential to modulate low frequency magnetic signals to higher frequencies, where the noise floor is much lower and the signal to noise ratio higher.

  • nonlinear magnetoelectric response of a Metglas piezofiber laminate to a high frequency bipolar ac magnetic field
    Applied Physics Letters, 2013
    Co-Authors: Yaojin Wang, Junqi Gao, Ying Shen, Dwight D Viehland
    Abstract:

    A nonlinear magnetoelectric (ME) response has been investigated in a Metglas/piezofiber laminate by applying a bipolar AC magnetic field (Hac) without a DC magnetic bias. The ME voltage (VME) was measured for various amplitudes of Hac of up to 9 Oe over the frequency (f) range 0.1 < f < 40 kHz. Compared to the linear ME behavior, an anomalous response to f and Hac was observed, which is believed to be associated with the Eddy-current loss in the Metglas layers. A frequency multiplication effect was also observed for VME, which was understood by Fourier analysis of the nonlinearity in the magnetostriction.

  • giant magnetoelectric effect in self biased laminates under zero magnetic field
    Applied Physics Letters, 2013
    Co-Authors: Menghui Li, Jiefang Li, Zhiguang Wang, Yaojin Wang, Dwight D Viehland
    Abstract:

    A giant magnetoelectric (ME) effect in self-biased annealed Metglas/Pb(Zr,Ti)O3/Metglas laminates under zero magnetic bias is reported. The remanent magnetization was increased by annealing Metglas, which generated an internal bias field. This shifted the M-H hysteresis loops, yielding large values for the ME voltage coefficient of αME = 12 V/cm·Oe and 380 V/cm·Oe at 1 kHz and electromechanical resonance under zero magnetic bias, respectively. This self-biased laminate is shown to have a high sensitivity to ac magnetic fields.