On the Room Temperature Ferromagnetic and Ferroelectric Properties of Pb(Fe1/2Nb1/2)O3

Matteppanavar, Shidaling; Rayaprol, Sudhindra; Anupama, A.V.; Sahoo, Balaram; Angadi, Basavaraj

doi:10.1007/s10948-015-3058-x

Cited by 22 publications

(12 citation statements)

References 27 publications

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“…This can also be the origin of weak ferromagnetic ordering in the PFW ceramic. In our recent work [17] and the work by Chillal et al [18], it is reported that for Pb(Fe 1/2 Nb 1/2 )O 3 (a similar system like the present system (PFW)), two types of magnetic order emerge independently: (i) infinite-range percolation cluster (antiferromagnetic order) and (ii) (Fe 3 þ ions unblocked) super-antiferromagnetic Fe 3 þ clusters. The coexistence of both of the above systems leads to a single homogenous phase, with the magnetic moments arranged in a speromagnetic-like or spin-glass-like fashion.…”

Section: Magnetization Studiessupporting

confidence: 56%

Origin of room temperature weak-ferromagnetism in antiferromagnetic Pb(Fe2/3W1/3)O3 ceramic

Matteppanavar

Rayaprol

Anupama

et al. 2015

Ceramics International

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We report the origin of room temperature weak ferromagnetic behavior of polycrystalline Pb(Fe 2/3 W 1/3 )O 3 (PFW) powder. The structure and magnetic properties of the ceramic powder prepared by a Columbite method were characterized by X-ray and neutron diffraction, Mössbauer spectroscopy and magnetization measurements. Rietveld analysis of diffraction data confirm the formation of single phase PFW, without traces of any parasitic pyrochlore phase. PFW was found to crystallize in the cubic structure at room temperature. The Rietveld refinement of neutron diffraction data measured at room temperature confirmed the G-type antiferromagnetic structure of PFW in our sample. However, along with the antiferromagnetic (AFM) ordering of the Fe spins, we have observed the existence of weak ferromagnetism at room temperature through: (i) a clear opening of hysteresis (M-H) loop, (ii) bifurcation of the field cooled and zero-field cooled susceptibility; supported by Mössbauer spectroscopy results. The P-E loop measurements showed a non-linear slim hysteresis loop at room temperature due to the electronic conduction through the local inhomogeneities in the PFW crystallites and the inter-particle regions. By corroborating all the magnetic measurements, especially the spin glass nature of the sample, with the conduction behavior of the sample, we report here that the observed ferromagnetism originates at these local inhomogeneous regions in the sample, where the Fe-spins are not perfectly aligned antiferromagnetically due to the compositional disordering.

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Section: Magnetization Studiessupporting

confidence: 56%

Origin of room temperature weak-ferromagnetism in antiferromagnetic Pb(Fe2/3W1/3)O3 ceramic

Matteppanavar

Rayaprol

Anupama

et al. 2015

Ceramics International

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“…The RT Mössbauer studies for x = 0.0 and 1.0 are reported elsewhere [9 and 43] and are well matching with the other reports [5,52,55,56].…”

Section: Mössbauer Spectroscopysupporting

confidence: 88%

“…From the above results, it is clearly confirmed that the x = 0.0 and 1.0 exhibits the weak ferromagnetic ordering with small opening of loops [52] at RT with paramagnetic and antiferromagnetic phases, respectively [18]. The occurrence of weak ferromagnetic ordering is due to the disordered antiferromagnetic interactions through -Fe 3+ -O -Fe 3+ -superexchange paths and -Fe 3+ -O -W -O -Fe 3+ -super -super -exchange paths in the present samples [53].…”

Section: Magnetic Propertiessupporting

confidence: 54%

Composition dependent room temperature structure, electric and magnetic properties in magnetoelectric Pb(Fe 1/2 Nb 1/2 )O 3 Pb(Fe 2/3 W 1/3 )O 3 solid-solutions

Matteppanavar

Rayaprol

Angadi

et al. 2016

Journal of Alloys and Compounds

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“…A closely similar pattern is seen with increasing PZ content along the PZ-PFN join in Lidoped samples [42]. There is, however, great variability between samples, and weak ferromagnetism has been reported both at room temperature and at temperatures up to *530-580 K [28,[86][87][88][89] [47]. It remains possible that the weak room temperature ferromagnetism in PFN and PZT-PFN is due to the presence of some minor impurity phase, but Kuzian et al [90,91] have shown that ferrimagnetic ordering might occur in PFN, while Glinchuk et al [4] have shown how a nanodomain structure of local chemical ordering could lead to ferromagnetism in PZT-PFN.…”

Section: Magnetic Propertiessupporting

confidence: 65%

“…transition (T g & 10-30 K [78][79][80][81][82][83][84][85][86]) extends to at least 15 % PT. A closely similar pattern is seen with increasing PZ content along the PZ-PFN join in Lidoped samples [42].…”

Section: Magnetic Propertiesmentioning

confidence: 99%

Elastic and anelastic relaxation behaviour of perovskite multiferroics I: PbZr0.53Ti0.47O3 (PZT)–PbFe0.5Nb0.5O3 (PFN)

et al. 2016

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Perovskites in the ternary system PbTiO 3 (PT)-PbZrO 3 (PZ)-Pb(Fe 0.5 Nb 0.5 )O 3 (PFN) have attracted close interest because they can display simultaneous ferroelectric, magnetic and ferroelastic properties. Those with the most sensitive response to external fields are likely to have compositions near the morphotropic phase boundary (MPB) which lies close to the binary join Pb(Zr 0.53 Ti 0.47 )O 3 (PZT)-PFN. In the present study, the strength and dynamics of strain coupling behaviour which accompanies the development of ferroelectricity and (anti)ferromagnetism in ceramic PZT-PFN samples have been investigated by resonant ultrasound spectroscopy. Elastic softening ahead of the cubic-tetragonal transition does not fit with models based on dispersion of the soft mode or relaxor characteristics but is attributed, instead, to coupling between acoustic modes and a central peak mode from correlated relaxations and/or microstructure dynamics. Softening of the shear modulus through the transition by up to *50 % fits with the expected pattern for linear/quadratic strain/order parameter coupling at an improper ferroelastic transition and close to tricritical evolution for the order parameter. Superattenuation of acoustic resonances in a temperature interval of *100 K below the transition point is indicative of mobile ferroelastic twin walls. By way of contrast, the first-order tetragonalmonoclinic transition involves only a small change in the shear modulus and is not accompanied by significant changes in acoustic dissipation. The dominant Address correspondence to E-mail: mc43@esc.cam.ac.uk DOI 10.1007/s10853-016-0280-2 J Mater Sci (2016) 51:10727-10760 feature of the elastic and anelastic properties at low temperatures is a concaveup variation of the shear modulus and relatively high loss down to the lowest temperature, which appears to be the signature of materials with substantial local strain heterogeneity and a spectrum of strain relaxation times. No evidence of magnetoelastic coupling has been found, in spite of the samples displaying ferromagnetism below *550 K and possible spin glass ordering below *50 K. For the important multiferroic perovskite ceramics with compositions close to the MPB of ternary PT-PZ-PFN, there must be some focus in future on the role of strain heterogeneity.

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On the Room Temperature Ferromagnetic and Ferroelectric Properties of Pb(Fe1/2Nb1/2)O3

Cited by 22 publications

References 27 publications

Origin of room temperature weak-ferromagnetism in antiferromagnetic Pb(Fe2/3W1/3)O3 ceramic

Origin of room temperature weak-ferromagnetism in antiferromagnetic Pb(Fe2/3W1/3)O3 ceramic

Composition dependent room temperature structure, electric and magnetic properties in magnetoelectric Pb(Fe 1/2 Nb 1/2 )O 3 Pb(Fe 2/3 W 1/3 )O 3 solid-solutions

Elastic and anelastic relaxation behaviour of perovskite multiferroics I: PbZr0.53Ti0.47O3 (PZT)–PbFe0.5Nb0.5O3 (PFN)

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