Magnetic properties and NMR studies of the SrAlM hexagonal ferrite system

Magnetic properties and 57Fe NMR studies of U-type hexaferrites

“…No intensity correction has been made in spectra for the frequency dependence of the resonance signal. Four well resolved resonance peaks observed in the spectra, corresponding to different crystallographic lattice sites of iron are similar to the frequency positions reported for M-type hexaferrites [17][18][19][20][21]. The main difference between the NMR spectra of M-type hexaferrites and that of given in Fig.…”

“…The use of powder X-ray diffraction here is very difficult in predicting phases because their XRD pattern is too complex. Though there exist the 57 Fe NMR studies on M [17][18][19][20] and W-type [21] hexaferrites, there are no reports on the 57 Fe NMR studies on U-type hexaferrites in the literature. Our aims in this work were to study the magnetic properties and the local structure by the 57 Fe NMR spectrum on polycrystalline U-type hexaferrite and to compare the results with the well studied M-and other types of hexaferrites.…”

The Effect of Chromium and Aluminium Ion Substitution on Phase Analysis, Microstructure and Magnetic Properties of Sr-Hexaferrite Ceramics and Nanopowders Synthesized by the Auto Combustion Route

“…1) show that the optimal calcining temperature is about 1100 • C. By increasing calcining temperature, the non-magnetic phase (hematite) was disappeared.Higher temperatures than 1100 • C result to grain growth during calcination and the grain size increase, which is not suitable to obtain higher amount of coercivity force in magnetic ceramics. [16]. Figure 3 shows the FE-SEM micrographs of Al-doped strontium hexaferritenanopowderscalcined at 1100 • C for 5 h. Plate-like and hexagonal shaped Sr-hexaferrite are observed.…”

Single Crystal Growth of Aluminum substituted Strontium Hexaferrite SrFe12-xAlxO19

“…Магнитные свойства, свойственные гесаферритам, можно существенно улучшить замещая Fe 3+ ионами различных металлов. Например, Cu 2+ [13], Cr 3+ [14, 15], Ga 3+ [16], Ti 4+ [17], Al 3+ [18][19][20].…”