Preparation and studies on surface modifications of calcium-silico-phosphate ferrimagnetic glass-ceramics in simulated body fluid

Design and development of Ga-substituted Z-type hexaferrites for microwave absorber applications: Mössbauer, static and dynamic properties

“…8(a)). These values are the typical values of Fe 3+ with high spin state [65][66][67][68]. The δ value of sextet D for composition x = 1.6 is found to be 0.73 mm/s, that confirms the more Fe 2+ ions along with Fe 3+ ions at this site [67,68].…”

“…The isomer shift for the octahedral site (δ oct ) is greater than that of the tetrahedral site (δ tet ), which helps to identify the different Fe-sites [72][73][74]. The isomer shift values of doublet-A for all samples are found to be between 0.136 mm/s and 0.33 mm/s, which is also indicating a Fe 3+ high spin state [65][66][67][68]75,76]. The values of δ for doublet-B in samples x ≥ 0.8 are found to be between 1.41 mm/s and 1.89 mm/s (Fe 2+ high spin).…”

“…The values of δ for doublet-B in samples x ≥ 0.8 are found to be between 1.41 mm/s and 1.89 mm/s (Fe 2+ high spin). These values belong to Fe 2+ ions in high spin state at octahedral sites [65][66][67][68]. The values for doublet-C in samples x ≥ 0.8 are between 0.39 mm/s and 0.605 mm/s (ΔE Q = 4.78-4.92 mm/s, Fe 2+ low spin state) [77].…”

Effect of gadolinium on magnetic circular dichroism and electron magnetic resonance of ε-Fe2O3 nanoparticles formed in borate glasses

“…Glass technology, being one of the oldest ways of creating materials, is still in high demand due to its facility of combining different elements, virtually unlimited variability and low production cost. In particular, in the context of the present study most interesting are works concerning the formation of magnetically ordered nanoparticles in glasses doped with transition or/and rare earth oxides [1][2][3][4][5][6][7][8][9][10][11][12][13]. As a rule, in order to obtain magnetic nanoparticles, rather high contents of transition metal oxides, most frequently Fe 2 O 3 , are introduced in the glass composition.…”

Investigation of structural, magnetic and dielectric properties of gallium substituted Z-type Sr3Co2-Ga Fe24O41 hexaferrites for microwave absorbers

“…Coordination, block location, the numbers of ions per formula unit, spin direction and six components (sextets) in Z-Type Sr 3 Co 2-x Ga x Fe 24 O 41 hexaferrite[61,89,90].…”