Study of room temperature magnetoelectric coupling in Ti substituted bismuth ferrite system

Kumar, Manoj; Yadav, K. L.

doi:10.1063/1.2349491

Cited by 215 publications

(103 citation statements)

References 22 publications

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“…Taking into account this fact, one can suggest that Fe/Ni coupling leads to the FM interaction which is responsible for the weak magnetism. Additionally, the magnetization can be enhanced owing to the breakdown of the balance between antiparallel sublattices [30]. The local lattice distortion, which is caused by the Ni 2+ substitution, gives rise to the FM super-exchange interaction with disturbance of the antiparallel magnetic ordering, and therefore causes the enhancement of the magnetization of BFNO ceramics [31].…”

Section: Resultsmentioning

confidence: 99%

“…In these compounds, the value of the spontaneous magnetization depends on the kind of substituting elements. Similarly, the replacement with Ti ions at the B sites exhibits a decrease in leakage current due to filling of the oxygen vacancies in BFO [21]. Recently, the enhancement of the FM property in 5% Ni-doped BFO ceramic has been realized [22].…”

Section: Introductionmentioning

confidence: 99%

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Reinforced magnetic properties of Ni-doped BiFeO3 ceramic

Hwang

Yoo

Lee

et al. 2016

Journal of the Korean Physical Society

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Multiferroic materials attract considerable interest because of the wide range of potential applications such as spintronic devices, data storage and sensors. As a strong candidate for the applications among the limited list of single-phase multiferroic materials, BiFeO3 (BFO) is a quite attractive material due to its multiferroic properties at room temperature (RT). However, BFO is widely known to have large leakage current and small spontaneous polarization due to the existence of crystalline defects such as oxygen vacancies. Furthermore, the magnetic moment of pure BFO is very weak owing to its antiferromagnetic nature. In this paper, the effects of Ni 2+ substitution on the magnetic properties of bulk BFO have been investigated. BFO, and BiFe0.99Ni0.01O3, BiFe0.98Ni0.02O3and BiFe0.97Ni0.03O3 (BFNO: Ni-doped BFO) ceramics were prepared by solid-state reaction and rapid sintering, and analyzed by structural and magnetic-property measurements. The leakage current density was measured at RT by using a standard ferroelectric tester. All the Ni-doped BFO exhibit the similar rhombohedral perovskite structure (R3c) to that of BFO. The magnetic properties of Ni-doped BFO are much enhanced with respect to BFO prepared at the same conditions, since the enhanced ferromagnetic interaction is caused by the Fe/Ni coupling.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Reinforced magnetic properties of Ni-doped BiFeO3 ceramic

Hwang

Yoo

Lee

et al. 2016

Journal of the Korean Physical Society

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“…The efforts have been made to reduce the leakage current density by either introducing dopants or using different fabrication methods [12][13][14][15][16]. At present, many researchers are engaged in the enrichment of multiferroic properties of BiFeO 3 -relevant materials, using different trivalent dopants such as La [17], Mn [18], Sm [19] and Ti [20]. There are many reports on the ferroelectric and magnetic behaviors of BiFeO 3 .…”

Section: Introductionmentioning

confidence: 99%

Structural, magnetic and dielectric properties of nano-crystalline Ni-doped BiFeO3 ceramics formulated by self-propagating high-temperature synthesis

Chaudhari

Mahajan²,

Jagtap

et al. 2013

J Adv Ceram

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Ni-doped BiFeO 3 powders with the composition BiFe 1x Ni x O 3 (x = 0.05, 0.1 and 0.15) were prepared by a self-propagating high-temperature synthesis (SHS), using metal nitrates as oxidizers and glycine as fuel. The X-ray diffraction (XRD) patterns depict that Ni-doped BiFeO 3 ceramics crystallize in a rhombhohedral phase. The scanning electron micrographs of Ni-doped BiFeO 3 ceramics show a dense morphology with interconnected structure. It is found that, the room-temperature magnetization measurements in Ni-incorporated

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“…Initially dielectric constant decreases slowly with frequency up to 1 MHz and becomes almost constant up to 12 MHz. Initial decrease in dielectric constant with frequency ͑up to 1 MHz͒ can be explained by the phenomenon of dipole relaxation 23,24 and justifies the depression in dielectric constant at low frequency. Similarly the dielectric loss decreases rapidly at low frequency and then becomes frequency independent at higher frequency.…”

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confidence: 99%

Study of electric and magnetic properties of (Bi0.9Pb0.1) (Fe0.9Ti0.1)O3 nanomultiferroic system

Singh

Kotnala

Singh

2008

Applied Physics Letters

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Multiferroic compound ͑Bi 0.9 Pb 0.1 ͒͑Fe 0.9 Ti 0.1 ͒O 3 ͑BPFTO͒, having particle size of 15-25 nm, was synthesized by solution combustion method. BPFTO shows the coexistence of ferroelectricity and magnetism at room temperature. Significant enhancement in magnetic moment with moderate value of the electrical polarization is observed for nano-BPFTO. Remanent polarization and maximum polarizations were 1.056 and 1.866 C / cm 2 , respectively ͑at 20 kV/cm͒, with remanent magnetization of 285 memu/g. Such materials, possessing good value of dielectric constant and showing ferroelectric and ferromagnetism in same phase, are of great importance from technical point of view. © 2008 American Institute of Physics. ͓DOI: 10.1063/1.3030989͔In recent years, there has been an increasing interest in multiferroic materials, which have simultaneously two or more order parameters such as ferromagnetic, ferroelectric, and/or ferroelastic ordering. 1,2 Coupling between magnetic and electric ordering leads to electromagnetic ͑EM͒ effect. The EM effect provides an additional degree of freedom in designing of functional sensor, current devices, transducers, and multistate memory devices. 3,4 However there is a scarcity of materials exhibiting magnetoelectric behavior at room temperature, which is possibly due to the fact that the transition metal d electron, essential in the presence of magnetic moment, also reduces lattice distortion. Lattice distortion is essential in the presence of the ferroelectric behavior. The perovskite BiFeO 3 ͑BFO͒ is one of the few known magnetoelectric multiferroics in which ferroelectric ͑T c ϳ 830°C͒ and antiferromagnetic ͑AF͒ ͑T N ϳ 370°C͒ order parameters coexist up to quite high temperature. 5,6 In BFO, Bi-O orbital hybridization due to Bi 6s 2 lone pair is responsible for ferroelectric instability while Fe-O-Fe Dzyaloshinski Moriyaantisymmetric interaction ͑DMI͒ gives rise to complicated magnetic structure. 7 The structural properties of bulk BFO single crystal have been extensively studied and have been shown to possess rhombohedral distorted perovskite structure and space group R3C at room temperature. 8 The spontaneous polarization of bulk BFO was expected to be 90-110 C / cm 2 ͑Ref. 9͒ because of large atomic displacement and a high Curie temperature. However, a small polarization has been observed in bulk BFO single crystal 10 and BFO bulk ceramics, 11 and their hysteresis loops were not saturated, which were attributed to the high level of leakage due to charge defects and nonstoichiometry. 12 To overcome these leakage problems ion substitution 13,14 or solid solution with other perovskite materials 15,16 has been tried, and wellsaturated hysteresis loop with remanent polarization has recently been reported in single phase BiFeO 3 ceramics. 17,18 Stoichiometric BFO has a G type AF structure 19 and has residual magnetic moment due to the canting of magnetic moments arising from oxygen vacancies. 20 In the present work we report the synthesis and study of electric and magnetic properties of th...

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Study of room temperature magnetoelectric coupling in Ti substituted bismuth ferrite system

Cited by 215 publications

References 22 publications

Reinforced magnetic properties of Ni-doped BiFeO3 ceramic

Reinforced magnetic properties of Ni-doped BiFeO3 ceramic

Structural, magnetic and dielectric properties of nano-crystalline Ni-doped BiFeO3 ceramics formulated by self-propagating high-temperature synthesis

Study of electric and magnetic properties of (Bi0.9Pb0.1) (Fe0.9Ti0.1)O3 nanomultiferroic system

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