Magnetocapacitance effect in multiferroic<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">BiMnO</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>

Kimura, T.; Kawamoto, Shinya; Yamada, Ikuya; Azuma, Masaki; Takano, Mikio; Tokura, Y.

doi:10.1103/physrevb.67.180401

Cited by 968 publications

(697 citation statements)

References 21 publications

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“…43 ε low was found to be ≈35-40, in a similar range as BMO permittivity values of ≈30 reported before. 34,43,49 The data were fitted to an equivalent circuit of a series of two RC elements [see inset in Figs. 2(a) and 2(b)].…”

Section: A Deconvolution Of Two Dielectric Relaxations In Bmo Thin Fmentioning

confidence: 99%

“…A short introduction into the basic principles of dielectric spectroscopy is given in the supplementary material part I. 29 MEC effects have been reported in a large range of materials by using dielectric spectroscopy, [30][31][32][33][34][35][36][37][38][39] where MEC effects were postulated in case that one of the following two criteria was fulfilled:…”

Section: Introductionmentioning

confidence: 99%

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Magnetoimpedance spectroscopy of epitaxial multiferroic thin films

et al. 2012

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The detection of true magnetocapacitance (MC) as a manifestation of magnetoelectric coupling (MEC) in multiferroic materials is a nontrivial task, because pure magnetoresistance (MR) of an extrinsic MaxwellWagner-type dielectric relaxation can lead to changes in capacitance [G. Catalan, Appl. Phys. Lett. 88, 102902 (2006)]. In order to clarify such difficulties involved with dielectric spectroscopy on multiferroic materials, we have simulated the dielectric permittivity ε of two dielectric relaxations in terms of a series of one intrinsic film-type and one extrinsic Maxwell-Wagner-type relaxation. Such a series of two relaxations was represented in the frequency-(f -) and temperature-(T -) dependent notations ε vs f and ε vs T by a circuit model consisting in a series of two ideal resistor-capacitor (RC) elements. Such simulations enabled rationalizing experimental f -, T-, and magnetic field-(H -) dependent dielectric spectroscopy data from multiferroic epitaxial thin films of BiMnO 3 (BMO) and BiFeO 3 (BFO) grown on Nb-doped SrTiO 3 . Concomitantly, the deconvolution of intrinsic film and extrinsic Maxwell-Wagner relaxations in BMO and BFO films was achieved by fitting f -dependent dielectric data to an adequate equivalent circuit model. Analysis of the H -dependent data in the form of determining the H -dependent values of the equivalent circuit resistors and capacitors then yielded the deconvoluted MC and MR values for the separated intrinsic dielectric relaxations in BMO and BFO thin films. Substantial intrinsic MR effects up to 65% in BMO films below the magnetic transition (T C ≈ 100 K) and perceptible intrinsic MEC up to − 1.5% near T C were identified unambiguously.

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Section: A Deconvolution Of Two Dielectric Relaxations In Bmo Thin Fmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Magnetoimpedance spectroscopy of epitaxial multiferroic thin films

et al. 2012

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“…8 and ground in an agate mortar till a homogeneous mixture was formed. This mixture was precalcined at 800 o C for 12 h. The pre-calcined powder was ground thoroughly, uniformly dye-pressed into 10 mm 3 diameter pellets and kept in furnace at 840 o C for 12 h. These preheated pellets were again ground, palletized and finally sintered at 1000 o C for 24 h.…”

Section: Synthesismentioning

confidence: 99%

“…Most well known examples of existing multiferroics are BiFeO 3 [7] and BiMnO 3 [8]. Where BiFeO 3 (T C ~ 850 °C, T N ~380 °C ) is a canted antiferromagnet, which gives rise to weak ferromagnetism and later one is metastable, requiring high pressure conditions for synthesis of bulk phases [8,9].…”

Section: Introductionmentioning

confidence: 99%

Magneto-electric coupling in multiferroic La0.8Bi0.2Fe0.7Mn0.3O3 ceramic

et al. 2010

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“…Further work is needed to fully understand and improve the magnetic properties of BMO ultrathin film but this is the first experimental evidence of spin filtering with a complex oxide and thus constitutes a hallmark towards spinfilters operating at room temperature, using spinel ferrites for instance. In addition, since BMO is also ferroelectric, 30 and as a coupling between the magnetic and dielectric properties in this material has been recently reported, 31 …”

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confidence: 99%

Spin filtering through ferromagneticBiMnO3tunnel barriers

et al. 2005

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We report on experiments of spin filtering through ultrathin single-crystal layers of the insulating and ferromagnetic oxide BiMnO 3 ͑BMO͒. The spin polarization of the electrons tunneling from a gold electrode through BMO is analyzed with a counterelectrode of the half-metallic oxide La 2/3 Sr 1/3 MnO 3 ͑LSMO͒. At 3 K we find a 50% change of the tunnel resistances according to whether the magnetizations of BMO and LSMO are parallel or opposite. This effect corresponds to a spin-filtering efficiency of up to 22%. Our results thus show the potential of complex ferromagnetic insulating oxides for spin filtering and injection.

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Magnetocapacitance effect in multiferroicBiMnO3

Cited by 968 publications

References 21 publications

Magnetoimpedance spectroscopy of epitaxial multiferroic thin films

Magnetoimpedance spectroscopy of epitaxial multiferroic thin films

Magneto-electric coupling in multiferroic La0.8Bi0.2Fe0.7Mn0.3O3 ceramic

Spin filtering through ferromagneticBiMnO3tunnel barriers

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