Investigation of Structural, Magnetic and Dielectric Properties of Terbium Doped Strontium Hexaferrite for High Frequency Applications

Investigation of Ferrimagnetic Sr-hexaferrite Nanocrystals for Clinical Hyperthermia

“…Remanence values, Mr were determined to be 76.4 and 67.8 emu/g for SHF-O1 and SHF-O2, respectively. Remanence values of the Sr-hexaferrites at the room temperature in the previous studies were substantially lower, 13.2 emu/g in comparison [13] due to canted type spin structures in the ferrimagnetic hexaferrites. The coercivities, Hc at 2K were measured to be 150Oe for both SHF-O1 and SHF-O2 samples which were significantly lower in comparison to those at room temperature [13], typical of M-type hexaferrites.…”

“…These results can be attributed to the appropriate sintering treatment which permitted to obtain an oriented Srhexaferrite [24]. Instead, the room temperature SQR values were lower, i.e 0.54 for Sr-hexaferrite [13] because the spin canting causes a reduced remanence in the hexaferrites [12]. The mean crystallite size values of 44  3 nm and 41  3 nm for SHF-O1 and SHF-O2, respectively were calculated to be smaller than the critical value for a single-domain (650 nm) of the Sr-hexaferrites [25].…”

“…Two of the M-type , exhibit a magnetoplumbite structure. Easy magnetization direction is the c-axis in both of them [13].…”

Studies of structural, magnetic and dielectric properties of X-type Barium Zinc hexaferrite Ba2Zn2Fe28O46 powder prepared by combustion treatment method using ginger root extract as a green reducing agent

“…Currently, sustainable fresh approaches that use green chemistry to improve and protect our environment are the main concerns in many areas of research. Preparation of novel magnetic materials has become very attractive due to their potential applications in radar absorbing materials (RAM), electronics [1,2], high-density magnetic recording [3e6], biocompatible magnetic nanoparticles for cancer treatment [7e10] and magnetic resonance imaging (MRI) [11,12]. The development of biodegradable and cost-efficient synthesis methods of nanomaterial remains a scientific challenge.…”