Comparison of the Kerr effect and X-ray pole figure methods for determining crystallographic texture in PrFeB magnets

Determination of the crystallographic texture of sintered PrFeB magnets based on X-ray diffraction patterns

“…The isotropic magnet was obtained without applying the orienting magnetic field. The crystallographic alignment was initially determined by XRPF, using the (0 0 4) reflection [5,6] considered a standard reference for a comparison with XRDP. XRD patterns were obtained with Cu Ka radiation on an orthogonal magnet surface in the direction of the orienting field.…”

“…Ferrante et al [3] evaluated the magnetic alignment of hot-rolled (Nd,Pr)FeB magnets, also using this technique. More recently, it has been shown that the alignment index /cos YS, determined by the (0 0 4) X-ray pole figures (XRPF) analysis, is ideal to represent the degree of alignment of PrFeB magnets [4][5][6]. This index is convenient for use in mathematical equations for quantitative calculations of remanence values [5].…”

The effect of chelating copolymer additive on the yttrium iron garnet (YIG) nanoparticle formation

“…This calcination temperature of YIG is obviously lower than that reported in the literature. [4,12] However, the crystal peaks of YFeO 3 perovskite (YIP) present on the YIG are obtained by PBI2P and PBI3P, even though the calcination temperature was increased to 9008C, as shown in Fig. 2.…”

“…Yttrium iron garnet (YIG) is a well-known ferromagnetic garnet material and it has been widely used in electronic devices, such as circulators, phase shifters for microwave, and magneto-optical devices, [1,2] etc., because YIG has controllable saturation magnetization, low dielectric loss tangent (tan d) in microwave region, and small line width (DH) in ferromagnetic resonance. [3] Many methods, including the solid-state reaction, [4] sol-gel method, [5,6] and co-precipitation methods [7] , can be employed to prepare the YIG material. For example, Zhao et al [4] synthesized the YIG with Bi substitution by using the ball mill of Y 2 O 3 and Fe 2 O 3 powders at high temperature.…”

“…[3] Many methods, including the solid-state reaction, [4] sol-gel method, [5,6] and co-precipitation methods [7] , can be employed to prepare the YIG material. For example, Zhao et al [4] synthesized the YIG with Bi substitution by using the ball mill of Y 2 O 3 and Fe 2 O 3 powders at high temperature. However, this method needs the high sintering temperature (>13008C), and thus it is hardly used in multilayer microwave component because the melting points of highly conductive metals like Ag-Pd alloy are lower than that of YIG.…”