Correlation between temperature dependent dielectric and DC resistivity of Cr substituted barium hexaferrite

Investigation of magnetoelectric effect in lead free K0.5Na0.5NbO3-BaFe12O19 novel composite system

“…On increasing the temperature further, the ordered electric dipoles become disordered owing to surplus of thermal energy consequently causing a sudden decrease in ε' with temperature increases. This peak temperature corresponds to ferroelectric-paraelectric phase transition (T m ) [34]. The obtained results are nearly consistent with Ref.…”

Magnetic and dipole moments in indium doped barium hexaferrites

“…2). The Fe 3+ cation in the Fe2 -2b position is Spontaneous polarization was previously observed in diamagnetic doped barium hexaferrites [13][14][15][16][17][18][19][20][21], but the mechanism of its appearance remains unclear. The appearance of a nonzero dipole electric moment, due to the distortion of the oxygen environment of the magnetoactive iron cations, can be a consequence of the order-disorder transition, which is undergoing crystal structure.…”

“…The temperature of ferroelectric ordering in M-type hexaferrites has not yet been determined exactly. However, taking into account the temperature dependence of the dielectric constant for BaFe 12-x Cr x O 19 and the peak of this dependence in the region of 670 K [21], it can be assumed that T C is below the magnetic ordering temperature for this class of compounds. Raman and infra-red spectroscopy of the high-temperature paraelectric and low-temperature ferroelectric phases showed only weak bands in the ferroelectric phase due to the non-centrosymmetricity, indicating that the structural differences between the ferroelectric and paraelectric phases are very small [29].…”

“…Mechanism for its realization is also important [11][12][13][14]. This question presents both fundamental scientific interest and it is important from a practical point of view [15][16][17][18][19][20][21][22][23][24][25]. Some controversy about ferroelectricity in the M-type hexaferrites exists [26].…”

Structural phase stabilization via Ba site doping with bivalent Sr, Ca and Zn ions and Fe site doping with trivalent Cr and Ga ions in the BaFe12O19 hexaferrite and its magnetic modification

“…The modification of magnetic and electrical properties via the doping of non-magnetic divalent elements (Zn, Ca, Sr) at the Ba sites of the BaM crystal structure has been reported in the literature. [12][13][14][15][16][17] A non-uniform variation in the magnetization and coercivity has been reported in Cr-doped BaM. 14 Zn doping in the BaM system enhances This journal is © The Royal Society of Chemistry 2022 magnetization.…”