Magnetic and microwave absorption properties of BaMgx/2Mnx/2CoxTi2xFe12−4xO19 hexaferrite nanoparticles

Recent Progress in Hexagonal Ferrites Based Composites for Microwave Absorption

“…[215] Efforts have been made to enhance the magnetic characteristics of hexaferrite by cationic substitution to meet a variety of applications. [148,216] These includes efforts on altering the intrinsic properties of hexaferrites by replacing with either single or multiple trivalent metal ions such as La 3+ , [217][218][219][220][221] Tb 3+ , [222,223] Nd 3+ , [138][139][140][224][225][226] Eu 3+ , [227] Dy 3+ , [228,229] Sm 3+ , [230,231] Cr 3+ , [232,233] Al 3+ , [185,186,234,235] Gd 3+ , [236][237][238] Sc 3+ , [239] Er 3+ , [240][241][242] Pr 3+ , [243] Yb 3+ , [244] Ce 3+ , [245] La 3+ -Pr 3+ , [246] La 3+ -Nd 3+ , [247] Nd 3+ -Sm 3+ , [248] Nb 3+ -Y 3+ , [249] La 3+ -Ce 3+ , [250] Er 3+ -Cr 3+ , [251] Dy 3+ -Nd 3+ -Pr 3+ [252] or a suitable mix of divalent and trivalent ions such as Tb 3+ -Mn 2+ , …”

“…[ 215 ] Efforts have been made to enhance the magnetic characteristics of hexaferrite by cationic substitution to meet a variety of applications. [ 148,216 ] These includes efforts on altering the intrinsic properties of hexaferrites by replacing with either single or multiple trivalent metal ions such as La 3+ , [ 217–221 ] Tb 3+ , [ 222,223 ] Nd 3+ , [ 138–140,224–226 ] Eu 3+ , [ 227 ] Dy 3+ , [ 228,229 ] Sm 3+ , [ 230,231 ] Cr 3+ , [ 232,233 ] Al 3+ , [ 185,186,234,235 ] Gd 3+ , [ 236–238 ] Sc 3+ , [ 239 ] Er 3+ , [ 240–242 ] Pr 3+ , [ 243 ] Yb 3+ , [ 244 ] Ce 3+ , [ 245 ] La 3+ –Pr 3+ , [ 246 ] La 3+ –Nd 3+ , [ 247 ] Nd 3+ –Sm 3+ , [ 248 ] Nb 3+ –Y 3+ , [ 249 ] La 3+ –Ce 3+ , [ 250 ] Er 3+ –Cr 3+ , [ 251 ] Dy 3+ –Nd 3+ –Pr 3+[ 252 ] or a suitable mix of divalent and trivalent ions such as Tb 3+ –Mn 2+ , [ 253 ] Nd 3+ –Co 2+ , [ 254 ] Gd 3+ –Co 2+ , [ 255 ] Pr 3+ –Mn 2+ , [ 256 ] Sm 3+ –Co 2+ , [ 257 ] La 3+ –Co 2+ , [ 258 ] La 3+ –Mn 2+ , [ 259 ] Pr 3+ –Co 2+ , [ 260 ] Cu 2+ –Cr 3+ , [ 261 ] Al 3+ –Mg 2+ , [ 262 ] Ce 3+ –Zn 2+ , [ 263 ] Ce 3+ –Co 2+ , [ 264 ] Gd 3+ –Mn 2+ ‐Co 2+ , [ 265 ] Ca 2+ –La 3+ –Co 2+[ 266 ] or tetravalent Zr 4+[ 267 ] or a divalent and tetravalent ions such as Co 2+ –Si 4+ , [ 268 ] Cu 2+ –Zr 4+,[ 269 ] Zr 4+ –Co 2+ , [...…”

Characterization of magnetic and microwave absorption properties of multi-walled carbon nanotubes/Mn-Cu-Zr substituted strontium hexaferrite nanocomposites

“…It is known that the anisotropy field is contingent to coercivity [1,27], and as mentioned in the previous section, doping of the samples reduces the coercivity of the nanocomposites. Therefore, according to Eq.…”

Electromagnetic Interference Shielding Properties of BaCo2Fe16O27 Nanoplatelets and RGO Reinforced PVDF Polymer Composite Flexible Films

“…Therefore, hexaferrites are of great interest for making microwave absorbers. [ 9,10 ] Hexaferrite unit cell consists of three blocks namely S block (spinel block) without barium ions, R block (hexagonal block) with barium ions and two oxygen layers, T block (hexagonal block) with barium ions and four oxygen layers. [ 11 ] They are basically classified as M, Y, W, Z, X, and U type and complexity of unit cell varies with the type of hexaferrite.…”