Electrical impedance functionality and spin orientation transformation of nanostructured Sr-substituted BaMnO 3 hexagonal perovskites

Exploration through Structural, Electrical, and Magnetic Properties of Al3+ Doped Ni–Zn–Co Nanospinel Ferrites

“…Moreover, asymmetric peaks at higher frequencies indicate space charge separation for all of the ferrite samples. The variation of maxima confirms the differences in space charge polarization with compositions x . In contrast, the low values of M ′ (ω) in the low-frequency regime generate the conduction process due to the long-range mobility of charge carriers…”

“…The variation of maxima confirms the differences in space charge polarization with compositions x. 43 In contrast, the low values of M′ (ω) in the low-frequency regime generate the conduction process due to the long-range mobility of charge carriers. 44 M″(ω) shows slight asymmetric peaks for all of the six compositions x (Figure 8b).…”

High-Pressure Synthesis and Magnetism of the 4H-BaMnO3 Single Crystal and Its 6H-Type Polymorph

“…Perovskite structure oxides with a chemical formula of ABO 3 have diverse structural derivatives and A-B charge combinations and thus exhibit a series of interesting physical properties in magnetism, electrical transport, magnetoelectric coupling, and chemical catalysis. − The detailed crystal structure of perovskite is closely related to the relative size of cations at both A and B sites. Goldschmidt’s tolerance factor, t = ( r A + r O )/(√2)­( r B + r O ), is often used to describe such a relationship. , Here r A , r B , and r O denote the ionic radii of A, B, and O ions, respectively.…”

Oxidative coupling of bio-alcohols mixture over hierarchically porous perovskite catalysts for sustainable acrolein production

“…Most grain's plane and sharp faces also show the crystallographic texture and well-oriented growth samples. 22 The images also show the walls of macropores, which were assembled by a large number of nanoparticles with the formation of nanovoids, and it was apparent conrm that perovskite samples possessed hierarchically pore structure; this would make reactants more diffuse and increase the contact effectiveness between reactants and catalysts so that improved catalytic performance could be achieved. 33 All surfaces have been rearranged to take on more regular forms aer the reaction as shown in (Fig.…”

“…In case t was slightly decreasing from unity as in BSMO, as a consequence of twisting and sloping alterations of MnO 6 octahedron, Mn-O-Mn bond angle decreases 180 to recompense small A-site cations. 21,22 Fig. 2 displays the infrared spectra of the synthesized perovskites.…”