A review on 3d transition metal dilute magnetic REIn3 intermetallic compounds

The dilute magnetic intermetallic compound (DMIC) is an extended study of the dilute magnetic semiconductor. The giant magnetic effect and room temperature ferromagnetism are induced by doping minor 3d transition metal into REIn₃ intermetallic compound. Owing to the metallic processability, the REIn₃-based DMIC might have the potential application as magnetoelectric device. In this review, the structural stability, magnetic and electric transport properties of REIn_3-xT_x (RE=rare earth; T=Co, Mn, Fe; x=0—0.3) have been systematically summarized and analyzed.     

熵调控的Gd2Co17金属间化合物的结构与室温磁性能

熵调控材料因其独特的设计理念和优于传统合金的性能而受到广泛关注.本文将熵调控的设计理念引入金属间化合物中,设计并通过真空电弧熔炼的方法制备了一系列熵调控的Gd₂Co₁₇金属间化合物,期望通过熵调控的方法来稳定其结构,改善其磁性能.应用热力学理论预言熵调控的Gd₂Co₁₇系列金属间化合物具有稳定的单相,其单相性被X射线衍射实验所证实.通过组态熵调控原子尺寸因素,获得了菱方和六方两种晶体结构.熵调控改善了Gd₂Co₁₇系列金属间化合物的室温磁性能,过渡族金属位的熵调控使磁各向异性发生由基面到易轴的转变,稀土位的熵调控有助于提高其矫顽力,所有熵调控样品室温时的饱和磁矩均比二元Gd₂Co₁₇显著提升,可能是稀土或过渡族金属子晶格磁矩无序取向削弱了金属间化合物中稀土的4f电子与过渡族金属的3d电子磁矩之间的反平行交换作用所导致.磁价模型研究表明:熵调控设计导致Gd₂Co₁₇系列金...