Executive Summary : | Recent studies have confirmed the potential of antiferromagnets (AFMs) as active and efficient components in spintronic devices. AFMs have a zero net magnetic moment, making information undetectable to common magnetic exploration and indifferent to perturbing magnetic fields. They also have intrinsic high frequencies of antiferromagnetic dynamics and low power consumption properties, making them advantageous from conventional ferromagnets. Heusler alloys are particularly interesting as they can support 100% spin polarization, half metallicity, high anisotropy, and magnetization, which are highly desired in realistic spintronics applications. However, few AFM full Heusler alloys with sufficiently high Néel temperatures (TN) are reported, which can satisfy the desired demand for AFM spintronics devices. Controversial results regarding the origin of AFM ordering and spin correlations of Full Heusler compounds have been reported by different research groups. There is a lack of study on AFM of this system to explore its magnetic structure, which is required to overcome current application impediments. Current developments in exposing and utilizing unexplored features of AFM Heusler alloys have unveiled a new horizon, AFM spintronics, where the aim is to realize and regulate the dynamics of AFM moments and electron transport for use in new-concept spintronics devices. The focus of this proposal is AFM full Hausler Ru₂MnZ (Z= Sn, Sb, Ge, Si), which exhibits high spin polarization with TN around room temperature for Z = Si, Ge, Sn. |