Electron backscatter diffraction (EBSD) provides an area-weighted crystal orientation distribution (AW-COD), whereas magnetic properties such as remanence are governed by the volume-weighted crystal orientation distribution (VW-COD). To bridge this gap, we developed a method to estimate VW-COD from EBSD-derived AW-COD and applied it to Sr-ferrite and Nd-Fe-B sintered magnets. In Sr-ferrite, crystal orientation exhibits strong grain-size dependence, leading to a significant difference between VW-COD and AW-COD. In contrast, the grain-size dependence in Nd-Fe-B is minimal, and the two distributions nearly coincide. The angular dependence of remanence was calculated using both distributions and compared with experiments. For Nd-Fe-B, calculations based on AW-COD and VW-COD both agree well with measurements, whereas for Sr-ferrite, VW-COD yields good agreement. These results demonstrate that VW-COD is essential for quantitative discussion of magnetic properties in materials with grain-size-dependent orientation.

  QS-type ferrites, having Ba₂Sn_2+xFe³⁺_10.67-1.33xO₂₂ and Ba₂Sn_2+xFe²⁺_1+xFe³⁺_10-2xO₂₂ stoichiometries, were synthesized via powder metallurgy to map their synthesis conditions as functions of composition (x) and sintering temperature (T_S). Single-phase Ba₂Sn_2+xFe³⁺_10.67-1.33xO₂₂ was achieved within the -0.2 ≤ x ≤ 0.0 range, whereas Ba₂Sn_2+xFe²⁺_1+xFe³⁺_10-2xO₂₂ was identified as the main phase for 0.0 ≤ x ≤ 0.1. Néel temperatures (T_N) near 455 K (Ba₂Sn_2+xFe³⁺_10.67-1.33xO₂₂) and 410 K (Ba₂Sn_2+xFe²⁺_1+xFe³⁺_10-2xO₂₂) were detected through the temperature dependence of magnetization, thereby indicating distinct antiferromagnetic states. High-field magnetization measurements (H_max = 600 kOe, T = 4.2 K) displayed a low-field antiferromagnetic response, rapid growth below 100 kOe, and high-field plateaus, from which magnetic structure models were subsequently proposed. These findings contribute to the clarification of both the phase stability and magnetic behavior of QS-type ferrites concerning Fe valence chemistry.

  Recently 3D magnetic memory using artificial ferromagnets has been proposed as a high-performance memory. However, the interaction among ferromagnetic layers due to stray fields is thought to be a problem for further development of high-density memory. Here, we propose the use of synthetic antiferromagnets to solve the stray field problem. We show that stable bit shifting in 3D memory using SAF is possible by micromagnetic simulation.

  We demonstrate a cost-effective route for fabricating printed films of NbSi₂, a crystallographically chiral compound. Polycrystalline NbSi₂ powder was synthesized via a solid-state reaction and mixed with polyamic acid to produce a homogeneous slurry. The resulting slurry was printed onto Si substrates and subsequently dried at room temperature. The printed films consisted of single-phase polycrystalline NbSi₂ with a thickness of approximately 60 μm and a surface roughness of 2 μm. The Van der Pauw measurements revealed metallic resistivity of printed films.

  Magneto-optical spatial light modulators (MOSLMs), utilizing the magneto-optical (MO) effect, are well suited for the narrow-pitch pixels required to realize holographic images with a wide viewing zone. To achieve both a high pixel density and low power consumption, we have proposed a voltage-controlled MOSLM (VC-MOSLM) that applies dynamic magnetization reversal based on voltage-controlled magnetic anisotropy (VCMA), which consumes considerably less power in comparison to current-driven MOSLMs. This study investigated the potential for displaying gray levels using an MO pixel comprising multiple sub-structures with different shapes that are driven by VCMA. The micromagnetic simulation results indicate that the pixel can be partially or fully switched by adjusting the pulse width of the applied voltage; this is because the precession period of a sub-structure depends on its shape. This means that although our VC-MOSLM exhibits binary expression, we can realize gray levels in a pixel trough partial switching. This grayscale potential is highly beneficial for improving the quality of reconstructed holographic images.