Structure and Electromagnetic Properties of Bi1- xYxFe0.95Mn0.05O3(x = 0.05, 0.075 and 0.10)

Silva, J.; Reyes, A. P.; Castañeda, Raúl; Esparza, H.; Camacho, H.; Matutes, J.; Fuentes, L.

doi:10.1080/00150193.2012.671624

Cited by 9 publications

(6 citation statements)

References 36 publications

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“…1(b). Two clearly well-separated diffraction peaks, (1 0 4) and (1 1 0), in the vicinity of 2h = 32°were found to merge into a single peak (1 1 0) for P (20) sample. However, for L(20) sample, no change in diffraction peaks related to (1 0 4) and (1 1 0) planes were observed as shown in Fig.…”

Section: Resultsmentioning

confidence: 91%

“…As shown in the Fig. 3(a) (for BFO) T N lies above the maximum measured temperature whereas for L (20) sample, T N is found to be around 360°C. For the P(20) composition, instead of emergence of peak there is clear change in slope around 320°C.…”

Section: Dielectric Propertiesmentioning

confidence: 76%

“…The presence of this impurity phase is also evident from the XRD pattern for this sample. However, contribution of the impurity phase decreases to 10% for both LP(10)-T0 and P (20) compositions. The impurity phase disappears completely when Ti substitutes Fe.…”

Section: Resultsmentioning

confidence: 93%

“…In contrary, there is no trace of such response in the La substituted BFO, i.e. L (20). This shows that this peak is actually related to the presence of Pb 2+ ions, occupying the A-site.…”

Section: Dielectric Propertiesmentioning

confidence: 87%

“…of this phase is unavoidable during the kinetics of BFO formation due to Bi volatization. The occurrence of this phase is very common in BFO and is widely reported in literature [19,20]. Some authors also reported the presence of other phases such as Fe 2 O 3 , and Bi 2 Fe 4 O 9 [21,22].…”

Section: Introductionmentioning

confidence: 89%

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Ali²,

Rattani³

et al. 2015

Inter. Jour. of Nurs. Educ.

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a b s t r a c tThe work presents a comparative study of the effects of divalent (Pb), trivalent (La) and tetravalent (Ti) substituents on the multiferroic properties of BiFeO 3 (BFO). Both A and B-sites were substituted to obtain the compositions i.e. (Bi 1ÀxÀy La x Pb y )(Fe 1Àz Ti z )O 3 (x, y = 0, 0.1, 0.2 and z = 0, 0.05, 0.1, 0.15). Each of the substituent was particularly chosen i.e. Pb was chosen to keep the lone pair character which is the similar case as Bi ion. Additionally isovalent La was chosen to achieve single phase by reducing Bi volatization. Both these ions, on substitution, stabilized the crystal structure and suppressed the formation of extra phases which are unavoidable in pure BFO. All the Ti substituted and Bi 0.8 La 0.2 FeO 3 compositions exhibited rhombohedral perovskite (R3c) phase, while Bi 0.8 Pb 0.2 FeO 3 and Bi 0.8 La 0.1 Pb 0.1 FeO 3 exhibited cubic phase. Mössbauer measurements revealed that impurity phase in case of compositions with divalent and trivalent substituents, disappeared completely when Ti substituted Fe. For all the compositions Fe ions were found in +3 state. High temperature dielectric properties showed that all the compositions were ferroelectric with paraelectric transition lying well above the room temperature. Weak ferromagnetism was found in Ti substituted compositions where coercivity was found to increase as the Ti concentration increases. All the BFO samples substituted with Pb, exhibited a dielectric anomaly in the temperature range, 100°C 6 T 6 250°C. A systematic reduction in the intensity of the dielectric anomaly peak was observed as a function of Ti concentration which indicates that the anomaly is related to the conductivity and is element specific. However, Mössbauer data revealed absence of Fe 2+ state, which ensured that it was not related with the presence of Fe 2+ ions. Saturation polarization was found to increase as Ti concentration increased from 0% to 10%.

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Section: Resultsmentioning

confidence: 91%

Section: Dielectric Propertiesmentioning

confidence: 76%

Section: Resultsmentioning

confidence: 93%

“…In contrary, there is no trace of such response in the La substituted BFO, i.e. L (20). This shows that this peak is actually related to the presence of Pb 2+ ions, occupying the A-site.…”

Section: Dielectric Propertiesmentioning

confidence: 87%