Structural properties study of the magneto-dielectric composite: Cr0.75Fe1.25O3 (CRFO):Fe0.5Cu0.75Ti0.75O3(FCTO)

Magnetic anisotropy and magnetodielectric coefficients in Cr2O3 and Fe0.4Cr1.6O3

“…In general, the magnetodielectric properties of a material are attributed either to magneto-resistance or to the changes in electric polarization (ME effect) in the material [3][4][5][6]11]. Researchers recently reported that the MD% maximum as a function of temperature corresponds to maximum in effective magnetic anisotropy coefficient of Fe 2 O 3 nanocomposites which are not magnetoelectric [33].…”

“…Multiferroicity is generally defined as the coupling between different ferroic orders (electric, magnetic, or elastic) with one subset producing the magnetoelectric effects (ME) and/or the other magnetodielectric effect (MD) [1,2]. While a few single phase materials exhibit ME/MD behavior [3][4][5][6], a fundamental understanding of the intrinsic coupling mechanisms is insufficient to adequately search for new materials with large coupling at room temperature. Therefore, understanding ME or MD coefficients and their relationships to other intrinsic material properties is important.…”

Novel magnetic–dielectric composite ceramic obtained from Y3Fe5O12 and CaTiO3

“…In this miniaturization process, the material must present higher dielectric permittivity (e r ) (antenna, for example) and higher thermal stability [4][5][6]. Due to this, composite ceramic materials have been appearing as promising alternative, where the mixture of distinct properties that are not interesting in the first moment, could result in another one (sum of the isolated phases) that can be applied [7][8][9][10][11][12][13][14][15].…”

The Thermal Stability of (CaTiO<sub>3</sub>)1-x (Cr<sub>3/4</sub>Fe<sub>5/4</sub>O<sub>3</sub>)<sub>x</sub> Ceramic Composites in the Microwave Region

“…In this structure, the calcium is localized in the Wyckoff position 4c, where the oxygen ions occupies the sites 4c and 8d and titanium occupies the site 4b. A crystallographic model based on iron oxide and on chromium oxide was proposed [7] to study the CRFO phase. It was suggested that CRFO presents (at room temperature) a trigonal structure belonging to 3 R cH (#167) spatial group, with six molecules per unity cell (Z = 6).…”

“…In general, an effective way to achieve near-zero or zero coefficient and boost the material quality factor is by compensating its large temperature coefficient values using compounds having temperature coefficient opposite signal. Cr 3/4 Fe 5/4 O 3 is a polycrystalline solid solution and member of the hematite (α-Fe 2 O 3 ) and eskolaite (Cr [7], in additional exhibited negative τ f [8] [9], which makes candidate to balance the temperature coefficient as composite together with CaTiO 3 .…”