Observation of direct and indirect magnetoelectricity in lead free ferroelectric (Na0.5Bi0.5TiO3)–magnetostrictive (CoFe2O4) particulate composite

Srinivas, A.; Krishnaiah, R. V.; Karthik, T.; Suresh, P.; Asthana, Saket; Kamat, S.V.

doi:10.1063/1.4745840

Cited by 58 publications

(16 citation statements)

References 21 publications

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“…Similarly, CFO-NBT composites exhibited a 15% change in magnetization. 40 In two-phase composite samples of the present type, an electrically induced strain of the ferroelectric phase due to the converse piezoelectric effect is expected to induce a change in magnetization and coercivity of the magnetic phase. These stress induced changes in magnetic properties can be attributed to the change in magnetic anisotropy.…”

Section: Paper Dalton Transactionsmentioning

confidence: 85%

Observation of magnetoelectric coupling and local piezoresponse in modified (Na_0.5Bi_0.5)TiO₃–BaTiO₃–CoFe₂O₄ lead-free composites

et al. 2014

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Lead-free particulate multiferroic composites of [0.94(Na0.5Bi0.5)TiO3-0.06 BaTiO3]:(Co0.6Zn0.4)(Fe1.7Mn0.3)O4 were synthesized and magnetoelectric (ME) properties were studied. X-ray diffraction and microstructural studies indicated the formation of a two-phase composite system without any impurities. The shift of Raman modes corresponding to ferroelectric and ferrite phases was assigned to the induced strain amid the formation of a two-phase system, in relation to the fraction of each phase in the samples. A strong local piezoresponse and hysteresis loops observed for composites established the ferroelectric properties at a nanoscale. Magnetostriction measurements revealed values of λ11 = -10.4 and λ12 = 5.3 ppm and piezomagnetic coefficient dλ11/dH = -0.0087 ppm Oe(-1) at 0.45 kOe for a composite with a ferrite concentration of 35 mol%. A maximum change of 18.5% in magnetization after electrical poling indicates a strong magnetoelectric response of the present composites followed by a direct ME coefficient of 8.2 mV cm(-1) Oe(-1). Our studies point to the fact that the present multiferroic composites having strong ME coupling are useful for lead-free electronic applications.

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Section: Paper Dalton Transactionsmentioning

confidence: 85%

Observation of magnetoelectric coupling and local piezoresponse in modified (Na_0.5Bi_0.5)TiO₃–BaTiO₃–CoFe₂O₄ lead-free composites

et al. 2014

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“…These high Curie temperature magnetic insulators can also be used in spintronics [6] and spincaloritronics (spintransfer torque devices) [7] applications due to their natural non-zero magnetic moment along with spin dependent band gaps. Recently, AB 2 [3,[8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

“…Ferrimagnetic materials, are an important class of magnetic ceramics, have drawn much attention for the past few decades due to their remarkable properties like high saturation magnetization, large permeability at high frequency, low eddy current, and high electrical resistivity to be utilized in solid state electronics and magneto-electronics [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Chemical bonding and magnetic properties of gadolinium (Gd) substituted cobalt ferrite

Puli

Adireddy

Ramana

2015

Journal of Alloys and Compounds

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Polycrystalline gadolinium (Gd) substituted cobalt ferrites (CoFe 2-x Gd x O 4 ; x=0-0.3, referred to CFGO) ceramics have been synthesized by solid state reaction method. Chemical bonding, crystal structure and magnetic properties of CFGO compounds have been evaluated as a function of Gd-content. X-ray diffraction and Raman spectroscopic analyses confirmed the formation of inverse spinel structure. However, a secondary ortho-ferrite phase (GdFeO 3 ) nucleates for higher values of Gd-content. A considerable increase in the saturation magnetization has been observed upon the initial substitution of Gd (x=0.1). The saturation magnetization drastically decreases at higher Gd content (x≥0.3). No contribution from ortho-ferrite GdFeO 3 phase is noted to the magnetic properties. The increase in the magnetic saturation magnetization is attributed to the higher magnetic moment of Gd 3+ (4f 7 ) residing in octahedral sites is higher when compared to that of Fe 3+ (3d 5 ) and as well due to the migration of Co 2+ (3d 7 ) ions from the octahedral to the tetrahedral sites with a magnetic moment aligned anti-parallel to those of rare earth (RE 3+ ) ions in the spinel lattice. Increase in coercivity with increase in Gd 3+ is content is attributed to magnetic anisotropy in the ceramics.

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“…6 and 7). Besides the resonance ME effect, even without DC bias magnetic field, the samples still exhibit reasonably high α 33 at low frequency when compared to the reported values of lead‐free ME materials such as BT‐LiCFO (0.375 mV/cmOe) , NFO‐BST (0.43 mV/cmOe) , CFO‐NBT (0.5 mV/cmOe) , BS‐CFO (2.1 mV/cmOe) , and BFO (3.0 mV/cmOe) . The results indicate that the ME performance of the material could be enhanced significantly after the addition of a small amount of La(Co 0.5 Mn 0.5 )O 3 .…”

Section: Resultsmentioning

confidence: 57%

Phase transition, piezoelectric, and multiferroic properties of La(Co_0.5Mn_0.5)O₃-modified BiFeO₃-BaTiO₃lead-free ceramics

Luo¹,

Jiang²,

Zou³

et al. 2015

Phys. Status Solidi A

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(0.75–x)BiFeO3−0.25BaTiO3−xLa(Co0.5Mn0.5)O3 + 1 mol% MnO2 lead‐free ceramics (x = 0–0.10) were synthesized by a conventional solid‐state reaction route and the effects of La(Co0.5Mn0.5)O3 on phase transition, piezoelectric, ferroelectric, and multiferroic properties of the ceramics were investigated. The ceramics can be well sintered at 960 °C for 2 h. After the addition of La(Co0.5Mn0.5)O3, the crystal structure of the ceramics is transformed from rhombohedral (space group R3c) to orthorhombic symmetry (space group Amm2), and the morphotropic phase boundary (MPB) of rhombohedral and orthorhombic phases is formed at x = 0.01–0.03. The dielectric peak of the ceramics was found to become diffusive with increasing x. The ceramics with x = 0–0.03 possess strong piezoelectricity with d33 of 95–108 pC N−1, strong ferroelectricity with Pr of 2.2–18.1 μC cm−2, considerable magnetoelectric coefficient of 372–672 mV/cmOe, and high Curie temperature of 523–659 °C, showing potential applications in multiferroic devices.

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Observation of direct and indirect magnetoelectricity in lead free ferroelectric (Na_0.5Bi_0.5TiO₃)–magnetostrictive (CoFe₂O₄) particulate composite

Cited by 58 publications

References 21 publications

Observation of magnetoelectric coupling and local piezoresponse in modified (Na_0.5Bi_0.5)TiO₃–BaTiO₃–CoFe₂O₄ lead-free composites

Observation of magnetoelectric coupling and local piezoresponse in modified (Na_0.5Bi_0.5)TiO₃–BaTiO₃–CoFe₂O₄ lead-free composites

Chemical bonding and magnetic properties of gadolinium (Gd) substituted cobalt ferrite

Phase transition, piezoelectric, and multiferroic properties of La(Co_0.5Mn_0.5)O₃-modified BiFeO₃-BaTiO₃lead-free ceramics

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Observation of direct and indirect magnetoelectricity in lead free ferroelectric (Na0.5Bi0.5TiO3)–magnetostrictive (CoFe2O4) particulate composite

Cited by 58 publications

References 21 publications

Observation of magnetoelectric coupling and local piezoresponse in modified (Na0.5Bi0.5)TiO3–BaTiO3–CoFe2O4 lead-free composites

Observation of magnetoelectric coupling and local piezoresponse in modified (Na0.5Bi0.5)TiO3–BaTiO3–CoFe2O4 lead-free composites

Chemical bonding and magnetic properties of gadolinium (Gd) substituted cobalt ferrite

Phase transition, piezoelectric, and multiferroic properties of La(Co0.5Mn0.5)O3-modified BiFeO3-BaTiO3lead-free ceramics

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Observation of direct and indirect magnetoelectricity in lead free ferroelectric (Na_0.5Bi_0.5TiO₃)–magnetostrictive (CoFe₂O₄) particulate composite

Observation of magnetoelectric coupling and local piezoresponse in modified (Na_0.5Bi_0.5)TiO₃–BaTiO₃–CoFe₂O₄ lead-free composites

Observation of magnetoelectric coupling and local piezoresponse in modified (Na_0.5Bi_0.5)TiO₃–BaTiO₃–CoFe₂O₄ lead-free composites

Phase transition, piezoelectric, and multiferroic properties of La(Co_0.5Mn_0.5)O₃-modified BiFeO₃-BaTiO₃lead-free ceramics