Giant magnetoresistance ratio in a current-perpendicular-to-plane spin valve based on an inverse Heusler alloy Ti₂NiAl

• Yu Feng,
• Zhou Cui,
• Bo Wu,
• Jianwei Li,
• Hongkuan Yuan and
• Hong Chen

Beilstein J. Nanotechnol. 2019, 10, 1658–1665, doi:10.3762/bjnano.10.161

• × 105, and it has great application potential in spintronics devices. Keywords: current-perpendicular-to-plane geometry; Heusler alloy; nonequilibrium Green’s function; spin transport; spintronics; spin valve; Introduction Since the first theoretical prediction of the half metallicity of Heusler

• compounds which have a space group of F-43M and chemical formula of X2YZ where the X atom locates at (0, 0, 0) and (0.25, 0.25, 0.25) sites, and the Y and Z atoms sit at (0.5, 0.5, 0.5) and (0.75, 0.75, 0.75 sites [16][17][18]. Half-metallicity has been predicted in Sc2MnSi [19], Ti2RuSn [20], and Ti2NiAl

Free-radical gases on two-dimensional transition-metal disulfides (XS₂, X = Mo/W): robust half-metallicity for efficient nitrogen oxide sensors

• Chunmei Zhang,
• Yalong Jiao,
• Fengxian Ma,
• Sri Kasi Matta,
• Steven Bottle and
• Aijun Du

Beilstein J. Nanotechnol. 2018, 9, 1641–1646, doi:10.3762/bjnano.9.156

• metal. More precisely, the single-layer XS2 (X = Mo, W) with NO adsorbed on it would behave like a metal in one spin channel while acting as a semiconductor in the other spin orientation. The half-metallicity is robust and independent of the NO concentration. In contrast, no half-metallic feature can be

• results also suggest XS2 (X = Mo, W) nanosheets can act as promising nanoscale NO sensors. Keywords: free radical; half-metallicity; nitric oxide (NO); sensors; spin-polarized; Introduction Nitrogen oxide (NOx) gases, one of the most common groups of air pollutants, are known as one culprit of acid rain

• selectively detect NO by exhibiting half-metallicity after physical adsorption of gas on the surface. For comparison, an investigation of NO2 adsorbed on single-layer XS2 (X = Mo, W) is also presented as both NO and NO2 are free radicals and can introduce magnetic moments to the gas/XS2 (X = Mo, W) system