Electrical and magnetic properties of Bi5FeTi3O15 compound prepared by inserting BiFeO3 into Bi4Ti3O12

Room temperature electromechanical and magnetic investigations of ferroelectric Aurivillius phase Bi5Ti3(FexMn1−x)O15 (x = 1 and 0.7) chemical solution deposited thin films

“…Given the absence of ferro/ferri-magnetic hysteresis, it is concluded that the BTFO and BTF7M3O thin films investigated do not show room temperature multiferroic behaviour. This is at-odds with some results published in the literature 19,20,36 which indicate some evidence for weak ferromagnetism in BTFO thin films and bulk ceramics at room temperature, although there is some variance in the reported saturation magnetization (M s ) values (e.g., M s ranges from $0.21 to 3.1 emu/cm 3 for the BTFO thin films). The occurrence of weak ferromagnetic behaviour in these compounds was attributed to local ferromagnetic Fe-O-Fe interactions; therefore, random distribution of the ironoxygen and titanium-oxygen octahedra in the different BTFO compounds investigated may account for the variation in the observed magnetic behaviour.…”

“…On the other hand, our previous investigations of the Bi 37 demonstrated that the observed ferromagnetic response was accounted for by the presence of trace amounts of second-phase ferromagnetic inclusions (undetected by x-ray diffraction measurements), whereas no magnetic response from the main Aurivillius phase was detectable. The previous reports 19,20,36 of ferromagnetic response in BTFO do not discuss the possibility of spinel phases such as iron oxide contributing to the ferromagnetic response observed. Given the absence of ferromagnetic hysteresis in the films studied here, the variance in the previously reported values and since trace amounts of magnetic impurities could lead to the magnetization values obtained, detailed analysis for possible magnetic impurity phases, and analysis of their effects should be performed before denoting …”

Structural and electrical properties of Bi3La2Ti3FeO15 ceramics

“…In order to solve these problems, several attempts have been made to synthesize rare-earth [5][6][7][8][9][10][11][12][13] or other elements [14] modified BFO or/and fabricate its solid solution and/or composites with other ferroelectric/ferrites [15]. In view of the above, structural, dielectric, electrical and magnetic properties of a new multioferroic fabricated with ferroelectric Bi 4 Ti 3 O 12 (T c = 650°C) and BiFeO 3 in equal molecular ratio (i.e., Bi 5 Ti 3 FeO 15 ) have been reported [16][17][18][19][20][21][22][23][24]. Because of multiple advantages of addition of lanthanum in ferroelectrics or/and multiferroics, we have recently carried out extensive studies of structural, dielectrics and ferroelectric properties of La modified ferroelectric/multiferroics Bi 5 Ti 3 FeO 15 , and reported some of them [25,26].…”

The influence of Ni-doping concentration on multiferroic behaviors in Bi4NdTi3FeO15 ceramics

“…Among them Bi 5 Ti 3 FeO 15 (BTF), which can be viewed as inserting the well-known multiferroic BFO unit into the typical ferroelectric compound Bi 4 Ti 3 O 12 (BTO), has been reconsidered as a multiferroics candidate because of its potential to present both ferroelectric and ferromagnetic transitions in a single phase and its possible ME coupling effect [8][9][10][11][12]. At the present stage, its structural, electric,and magnetic, as well as ME properties have been extensively investigated.…”