Magnetic Semiconductors as Materials for Spintronics

Abstract

From the various aspects of spintronics the review highlights the area devoted to the creation of new functional materials based on magnetic semiconductors and demonstrates both the main physical phenomena involved and the technical possibilities of creating various devices: maser, p-n diode with colossal magnetoresistance, spin valve, magnetic lens, optical modulators, spin wave amplifier, etc. Particular attention is paid to promising research directions such as ultrafast spin transport and THz spectroscopy of magnetic semiconductors. Special care has been taken to include a brief theoretical background and experimental results for the new spintronics approach employing magnetostrictive semiconductors—strain-magnetooptics. Finally, it presents top-down approaches for magnetic semiconductors. The mechano-physical methods of obtaining and features of the physical properties of high-density nanoceramics based on complex magnetic oxides are considered. The potential possibility of using these nanoceramics as an absorber of solar energy, as well as in modulators of electromagnetic radiation, is shown.

Thermoelectric and Magnetic Properties of Biphasic ZrFe0.5Ni0.5Sb Double Half-Heusler and ZrNiSb Half-Heusler Induced by Co Doping

“…Due to their distinctive features compared to nonmagnetic semiconductors (SC), magnetic SCs have recently become increasingly sought after for application in the rapidly developing realms of spintronics . Due to the band gap and ferromagnetic Fe and Ni components, the ZrFe 0.5 Ni 0.5 Sb DhH has the potential to be a magnetic semiconductor.…”

“…On the downside, the resulting lattice distortions greatly reduce the mobility of the charge carriers, denaturing the PF significantly in comparison to the parent hHs. − Therefore, effective PF restoration approaches are indispensable for opening DhHs for niche applications. In addition, efforts to expand the scope of applications for hHs in spin electronics as a means to increase their fiscal competitiveness are also gaining momentum. − …”

Realizing new 2D spintronic materials from the non-magnetic 1T-PdO2 monolayer through vacancy defects and doping

“…In this regard, half-metallic and diluted magnetic semiconductor materials hold promise for spintronic applications thanks to their 100% spin polarization. 31,32 For many years, different bulk systems, such as Heusler compounds, 33,34 diluted magnetic semiconductors, 35,36 metal oxides, 37,38 and double perovskites, 39,40 have been investigated. Recently, researchers have switched attention to explore 2D materials for spintronic applications.…”

Extreme magnetoresistance at high-mobility oxide heterointerfaces with dynamic defect tunability

“…The magnetic field-induced change in the electrical resistivity of materials and electronic devices may arise from a plethora of physical phenomena that sheds light on the underlying material properties, ranging from its spin state 1 , 2 and band structure 3 , 4 to its topological character 4 , and quantum transport behavior 5 , 6 . Magnetoresistance (MR) phenomena are grouped into different classes, including giant 7 , 8 , colossal 2 and extraordinary 9 , 10 magnetoresistance.…”