Magnetodielectric Effect in Two-Layer Magnetoelectric PZT-MZF Composite

Гриднев, С. А.; Калгин, А. В.; Chernykh, V. A.

doi:10.1080/10584580903432643

Cited by 48 publications

(17 citation statements)

References 6 publications

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“…According to the MW model, resistance of any layer is changed by magnetic field, which will change permittivity and magnetoresistance of a material. The total dielectric constant of composite is expected to have two contributions, one due to stress-induced variation in e and other due to the magnetic field-induced variation in dielectric constant of LSMO [23,24]. The magnetoresistance (MR) of composite in this field configuration is negative, and therefore, contribution due to the induced stress may produce a positive value of Mc, while the negative value of Mc would be due to Catalan-type contribution of LSMO [12] and is shown in Fig.…”

Section: Dielectric Propertiesmentioning

confidence: 99%

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Magnetoelectric and magnetodielectric properties of LSMO–(BCT–BZT) composites

Mane¹,

Tarale

Chavan³

et al. 2015

Indian J Phys

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The present paper reports magnetoelectric and magnetodielectric properties of La 0.67 Sr 0.33 MnO 3 and (Ba 0.7 Ca 0.3 TiO 3 )-(BaZr 0.2 Ti 0.8 O 3 ) composites. y(La 0.67 Sr 0.33 MnO 3 ) ? (1 -y)[x(Ba 0.7 Ca 0.3 TiO 3 )-(1 -x)(BaZr 0.2-Ti 0.8 O 3 )] particulate composites are prepared for x = 0.40, 0.45, and 0.50 and for y = 0.1 and 0.175. Ferroelectric compositions [x(Ba 0.7 Ca 0.3 TiO 3 )-(1 -x)(BaZr 0.2 Ti 0.8 O 3 )] are synthesized via ceramic route, while La 0.67 Sr 0.33 MnO 3 is synthesized via hydroxide co-precipitation route. Composites of La 0.67 Sr 0.33 MnO 3 and (Ba 0.7 Ca 0.3 TiO 3 )-(BaZr 0.2 Ti 0.8 O 3 ) are synthesized using ceramic method. The crystal structures of La 0.67 Sr 0.33 MnO 3 , [x(Ba 0.7 Ca 0.3 TiO 3 )-(1 -x)(BaZr 0.2-Ti 0.8 O 3 )], and composites are investigated using X-ray diffractograms, while microstructures are investigated using scanning electron microscope. The dielectric properties of [x(Ba 0.7 Ca 0.3 TiO 3 )-(1 -x)(BaZr 0.2 Ti 0.8 O 3 )] are determined as a function of temperature between 30 and 150°C and at frequencies 1, 10, 100 kHz, and 1 MHz. The investigations on P-E hysteresis loops of [x(Ba 0.7 Ca 0.3 TiO 3 )-(1 -x)(BaZr 0.2 Ti 0.8 O 3 )] show useful values of maximum polarization (P max ) and remanent polarization (P r ). Dielectric study on composites is carried out as a function of frequencies between 1 kHz and 1 MHz and for magnetic field between 0 and 6 KOe. The linear magnetoelectric coefficient ''a'' and quadratic magnetoelectric coefficient ''b'' are measured with the help of custom-designed setup. The results on magnetoelectric and magnetodielectric properties of composites are interesting.

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Section: Dielectric Propertiesmentioning

confidence: 99%

“…The Mc is expected to be negative or positive, which depends on the nature of the composite. If magnetoelectric coupling is more dominant in the composite, then magnetocapacitance is negative [14,15].…”

Section: Introductionmentioning

confidence: 97%

Magnetoelectric and magnetodielectric properties of LSMO–(BCT–BZT) composites

Mane¹,

Tarale

Chavan³

et al. 2015

Indian J Phys

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“…As discussed by Gridnev et al (2009), the increase in stress will cause increase in P max and, therefore, the e decreases for increase in stress and vice versa. As e decreases for increase in stress, the MC will be negative for positive k and positive for negative k. Further, it is already reported and discussed that the k k (parallel) is negative for CFMO composition, while k \ (perpendicular) is positive (Bhame et al 2006(Bhame et al , 2007.…”

Section: Magnetoelectric Effectmentioning

confidence: 99%

“…As discussed earlier, the MC occurs due to variation of dielectric constant because of the applied stress occurring due to the piezomagnetic effect in the ferrite phase (Gridnev et al 2009). Further, the MC should be proportional to k 9 k m 9 (de/ds), where k is magnetostrictive coefficient, k m the magnetomechanical coupling coefficient, de/ds the rate of change of dielectric constant as a function of applied stress.…”

Section: Magnetoelectric Effectmentioning

confidence: 99%

“…As shall be seen in the next paragraph, the Sr 0.5 Ba 0.5 Nb 2 O 6 (SBN) and Mn-substituted cobalt ferrite form a correct choice for the formation of such compositions (Chen and Tang Y 2004;Li et al 2006). Further, recently the laminated magnetoelectric (ME) composites of PZT-(MnZn)Fe 2 O 4 (MZF) are observed to exhibit useful magnitude of magnetodielectric coupling in the vicinity of electromechanical resonance frequency (Gridnev et al 2009). This phenomenon was also attributed to the stress-induced change in polarization and therefore the dielectric constant.…”

Section: Introductionmentioning

confidence: 99%

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Magnetoelectric and magnetodielectric properties of SBN–CMFO nanocomposites

et al. 2012

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The paper reports synthesis of nanoparticles of Sr 0.5 Ba 0.5 Nb 2 O 6 (SBN) and Co 1.2-x Mn x Fe 1.8 O 4 (CMFO) via ceramic and hydroxide co-precipitation routes, respectively. The nanopowders of SBN-CMFO0.1 (MSBN0.1) and SBN-CMFO0.3 (MSBN0.3) are compacted together to form the desired magnetoelectric/magnetodielectric (ME/MD) composites. The Bi 2 O 3 is used as a sintering aid. The Bi 2 O 3 at three weight percent is observed to cause agglomeration of SBN and CMFO particles and improve the magnetomechanical coupling. The paper reports synthesis, structural and morphological studies on the MSBN composites. The composites are investigated for their dielectric, ME and MD properties. The results on the magnetocapacitance (MC) are observed interesting and could be correctly understood in terms of the stressinduced variation in the dielectric constant. The MC is observed to remain fairly constant between 10 and 500 kHz and possess a useful magnitude of nearly 4 %.

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