Sol–gel auto combustion processed soft Z-type hexa nanoferrites for microwave antenna miniaturization

The structure, and magnetic properties of NiR0.05Fe1.95O4 (rare earth R=Sm, Gd): Effect of Thermal Neutron Radiation

“…As indicated in Table (2) and Figure (3a), the lattice constant decreases with increasing the exposure doses, and the effect of the exposure dose is more pronounced for NiGd0.05Fe1.95O4 samples. Such behavior is accompanied by the decrease of the width of the diffraction peaks with increasing the dose.…”

“…In the past few years, there has been an increase in the demand for microwave devices in automotive, consumer, and industrial radar systems to reduce the cost of the device [1][2][3]. Spinel ferrites are considered to be the best material for microwave absorbers because of their stability, high electrical resistivity, high magnetization, and high Curie temperature [1,4].…”

Design of Miniaturized Dual-Band Microstrip Antenna for WLAN Application

“…Reducing the size of the antenna will reduce the efficiency of the antenna and narrow the bandwidth. In many cases, especially in aerospace satellite communication and mobile communication, due to the limitation of physical space, small antennas are urgently needed [ 23 , 24 ]. Therefore, it is necessary to reduce the size of the antenna while improving the performance of the antenna.…”

Structural and Magnetic Properties of Ba3[Cu0.8−xZnxMn0.2]2Fe24O41 Z‐Type Hexaferrites

“…It was reported that specific choices of divalent metal ions in Z-type hexaferrite may improve their properties [12,[18][19][20][21][22][23]. Specifically, the substitution of Co 2+ by Cu 2+ , Zn 2+ , and Ni 2+ ions was adopted for enhancing the electromagnetic properties of Co 2 Z for miniaturized antenna applications [24], where the substitution of Zn 2+ improves the saturation magnetization, while the substitution of Cu 2+ lowers the sintering temperature. Also, Cu and Zn-substituted Co 2 Z hexaferrite demonstrated improved properties for multilayer chip inductor applications [25,26].…”

“…Previous experimental results revealed that the optimal sintering temperature for the synthesis of Z-type hexaferrites using conventional solid-state method was in the range of 1200°C-1350°C [40]. Lower sintering temperatures of 1150°C-1200°C, however, were sufficient for the production of Z-type hexaferrites using wet chemical methods [13,24,40,41]. e difficulty of obtaining a pure Z-type phase, and its tendency to coexist with other (M-, Y-, and W-type) hexaferrites and spinel phases, has led to adopting different modified synthesis routes, where synthesis of pure Co 2 Z hexaferrite was reported to be achieved at 1250°C sintering temperature [42,43].…”