Recent progress in ferromagnetic semiconductors and spintronics devices

Abstract

By actively using not only charge transport of electrons and holes but also their spins, we can create a variety of new phenomena and functional materials. It is highly expected that these new materials and phenomena are applied to the development of next-generation electronics and information technology. This field, called spintronics, is emerging and rapidly making progress in many subfields. This article focuses on one of the most important materials, ferromagnetic semiconductors (FMSs) which have the properties of both ferromagnets and semiconductors, and their applications. We review the recent progress in the studies of FMSs and their applications, particularly, spin transistors.

Diversified Phenomena in Metal- and Transition-Metal-Adsorbed Graphene Nanoribbons

“…On the other hand, most of Bi- and Ti-/Fe-/Co-adsorbed asymmetric systems exhibit the FM configurations under the induced spin states themselves and the greatly reduced edge-carbon magnetic moments, being in sharp contrast with the pristine GNR magnetic configuration. Specifically, the strong magnetic moments of Ti-, as well as Fe-adsorbed systems ( Table 1 ) might bring potential applications in spintronic devices [ 50 , 54 , 55 ]. There are several efficient methods for detecting magnetic moments [ 56 ].…”

Optically Gated Terahertz-Field-Driven Switching of Antiferromagnetic CuMnAs

“…The shown integration of AFM memory functionality with logical features of semiconductors and the compatibility of CuMnAs with various semiconductor substrates open the door toward a rich variety of applications known from dilute magnetic semiconductors 45,46 and multiferroic spintronics 47 .…”

Calcination Temperature Reflected Structural, Optical and Magnetic Properties of Nickel Oxide

“…The main feature is generally assigned to the screened core hole photoemission (Equation ( 3)) with peak 854 eV ascribed to local screening from lattice oxygen adjacent to the Ni 2p core hole and peak 855 eV being to nonlocal screening. The satellite region is fit to peak at 861 eV and peak at 865 eV and is dominated by the nonscreened mechanism of Equation (2). Evaluating the peak position and symmetry of the Ni 3p line shape, one can reason that nickel was present in a 2+ oxidation state.…”

“…Theory and experimental advances in ferromagnetic semiconductors offer anticipation for a new generation of microelectronic devices. In recent days, nanoscale ferromagnetic semiconductor oxides are gaining significant attention for various potential applications, such as spin-polarized carrier sources, a catalyst for oxygen evolution, and easy integration into semiconductor technology [1][2][3]. The study of small particles has become of increasing interest due to the new properties in those materials shown when the crystal size is reduced.…”