Browsing by Author "Bichurin, Mirza I."

Now showing 1 - 8 of 8
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    Demagnetizing factors for two parallel ferromagnetic plates and their applications to magnetoelectric laminated sensors
    Liverts, Edward; Grosz, Asaf; Zadov, Boris; Bichurin, Mirza I.; Pukinskiy, Yuri J.; Priya, Shashank; Viehland, Dwight D.; Paperno, Eugene (American Institute of Physics, 2011-04-01)
    An analytical expression is derived to approximate the magnetometric demagnetizing factors for two parallel ferromagnetic plates having the shape of rectangular prisms. The magnetometric demagnetizing factors relate the average magnetic fields within the plates' volumes to an external magnetic field. Knowing this relationship is essential for describing the response of magnetoelectric sensors comprising two parallel magnetostrictive plates. It is shown that two separate ferromagnetic layers provide better field sensitivity than a single layer with a doubled thickness. The obtained results are in a good agreement with numerical calculations and experimental data. (C) 2011 American Institute of Physics. [doi:10.1063/1.3536518]
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    Large magnetoelectric susceptibility: The fundamental property of piezoelectric and magnetostrictive laminated composites
    Zhai, Junyi; Li, Jiefang; Viehland, Dwight D.; Bichurin, Mirza I. (American Institute of Physics, 2007-01-01)
    The magnetoelectric (ME) susceptibility (alpha(me)) is the fundamental property that describes the coupling between the polarization and magnetization of a ME media. It is a complex quantity (alpha(*)(me)) which has rarely been studied. Here, we report investigations of the ME susceptibility for various ME laminated composites, which demonstrates that alpha(me) is on the order of 10(-7) s/m for these materials, which is dramatically larger than that of single phase materials. (c) 2007 American Institute of Physics.
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    Magnetoelectric gyration effect in Tb1-xDyxFe2-y/Pb(Zr,Ti)O-3 laminated composites at the electromechanical resonance
    Dong, Shuxiang; Zhai, Junyi; Li, Jiefang; Viehland, Dwight D.; Bichurin, Mirza I. (AIP Publishing, 2006-12-01)
    A giant current-to-voltage (I-V) gyration effect was found in magnetostrictive Tb1-xDyxFe2-y and piezoelectric Pb(Zr,Ti)O-3 laminated composites. An equivalent circuit theory was developed for magnetoelectric gyration, which predicted that I-V conversion is reduced by a frequency transfer function Z(R)(f) and that the maximum occurs at resonance. A giant conversion coefficient up to 2500 V/A was predicted and confirmed. (c) 2006 American Institute of Physics.
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    Magnetoelectric Interactions in Lead-Based and Lead-Free Composites
    Bichurin, Mirza I.; Petrov, Vladimir M.; Zakharov, Anatoly; Kovalenko, Denis; Yang, Su-Chul; Maurya, Deepam; Bedekar, Vishwas; Priya, Shashank (MDPI, 2011-04-06)
    Magnetoelectric (ME) composites that simultaneously exhibit ferroelectricity and ferromagnetism have recently gained significant attention as evident by the increasing number of publications. These research activities are direct results of the fact that multiferroic magnetoelectrics offer significant technological promise for multiple devices. Appropriate choice of phases with co-firing capability, magnetostriction and piezoelectric coefficient, such as Ni-PZT and NZFO-PZT, has resulted in fabrication of prototype components that promise transition. In this manuscript, we report the properties of Ni-PZT and NZFO-PZT composites in terms of ME voltage coefficients as a function of frequency and magnetic DC bias. In order to overcome the problem of toxicity of lead, we have conducted experiments with Pb-free piezoelectric compositions. Results are presented on the magnetoelectric performance of Ni-NKN, Ni-NBTBT and NZFO-NKN, NZFO-NBTBT systems illustrating their importance as an environmentally friendly alternative.
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    Metal-ceramic laminate composite magnetoelectric gradiometer
    Bedekar, Vishwas; Bichurin, Mirza I.; Ivanov, Sergey N.; Pukinskiy, Yuri J.; Priya, Shashank (AIP Publishing, 2010-03-01)
    Gradiometer resembles in functionality a magnetic field sensor where it measures the magnetic field gradient and its sensitivity is determined by the ability to quantify differential voltage change with respect to a reference value. Magnetoelectric (ME) gradiometer designed in this study is based upon the nickel (Ni)-Pb(Zr,Ti)O(3) (PZT) composites and utilizes the ring-dot piezoelectric transformer structure working near the resonance as the basis. The samples had the ring-dot electrode pattern printed on the top surface of PZT, where ring acts as the input while dot acts as the output. There is an insulation gap between the input and output section of 1.2 mm. The generated magnetic field due to converse ME effect interacts with the external applied magnetic field producing flux gradient, which is detected through the frequency shift and output voltage change in gradiometer structure. The measurements of output voltage dependence on applied magnetic field clearly illustrate that the proposed design can provide high sensitivity and bandwidth.
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    A quasi(unidirectional) Tellegen gyrator
    Zhai, Junyi; Li, Jiefang; Dong, Shuxiang; Viehland, Dwight D.; Bichurin, Mirza I. (American Institute of Physics, 2006-12-15)
    We show that magnetoelectric (ME) laminate composites have characteristics of a previously conjectured, but unfound, fifth network circuit element-the Tellegen gyrator. Our findings establish that ME laminate composites (i) are nonreciprocal electrical elements, (ii) have significant nondissipative I-V conversion near a resonance frequency, and (iii) act like a unidirectional gyrator, i.e., an ideal Tellegen gyrator connected with a capacitor on one side and an inductor on the other. (c) 2006 American Institute of Physics.
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    Three-dimensional left-handed material lens
    Petrov, R. V.; Srinivasan, Gopalan; Bichurin, Mirza I.; Viehland, Dwight D. (AIP Publishing, 2007-09-01)
    A model is provided for the image formation by a three-dimensional lens with negative index of refraction (n) and compared with results for an array of split-ring resonators (SRRs) and wires. For n=-1, a linear decrease in image distance r is expected with increasing object distance l. A nonlinear r vs l is anticipated for other n values. A lens of an array of SRRs and wires was made and characterized over 1-18 GHz and n=-1, and a gain of similar to 8 dB at 11.25 GHz was achieved. Results on r vs l are in excellent agreement with the model. (C) 2007 American Institute of Physics.
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    Tunable magnetoelectric response of dimensionally gradient laminate composites
    Park, Chee-Sung; Avirovik, Dragan; Bichurin, Mirza I.; Petrov, Vladimir M.; Priya, Shashank (AIP Publishing, 2012-05-01)
    A magnetoelectric (ME) sensor exhibiting wideband behavior as a function of applied magnetic DC bias and frequency was designed by combining the dimensionally gradient piezoelectric layer with Metglas magnetostrictive layers in laminate configuration. The ME coefficient of the band in the DC magnetic range of 52-242 Oe was measured to be 3000 mV/cm Oe under the resonant condition of f = 107 kHz. The wideband in the AC magnetic field frequency range of 41-110 kHz had the ME coefficient in the vicinity of 260 mV/cm Oe under the conditions of H-AC = 1 Oe and H-DC = 70 Oe. This frequency-dependent ME behavior clearly showed two different states on each side of the resonance peak which could open the possibility of developing new applications such as magnetic field-controlled switches. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4720095]