标题： Mn2V0.5Co0.5Z（Z= Ga，Al）Heusler 合金：具有高 Tc 和补偿温度的完全补偿铁磁体 显示英文标题

标题： Mn2V0.5Co0.5Z (Z= Ga, Al) Heusler alloys: Fully compensated ferrimagnets with high Tc and compensation temperature

摘要： 高温TC完全补偿的反铁磁体是基于自旋转移扭矩的自旋电子器件的潜在候选材料。 我们报告了高温TC完全补偿的反铁磁体Mn2V0.5Co0.5Z的结构和磁性特性，其中Z是Ga、Al，在熔融纺丝带材和电弧熔融块状形式中。 虽然母合金Mn2YZ其中Y是V、Co，Z是Ga、Al表现出每单元晶胞约2muB的磁矩值，Mn2V0.5Co0.5Ga合金在室温下表现出接近完全补偿的磁矩值分别为0.09和0.13muB每单元晶胞。 在块状和带材形式中分别如此。 对于Mn2V0.5Co0.5Al，这分别是0.04和0.08muB每单元晶胞。 与块状样品的Neel P型反铁磁行为相反，带材样品表现出Neel N型反铁磁特性，Ga合金的高补偿温度为420K，Al合金为275K。 观察到的TC值对于所有样品都超过640K。 电弧熔融和熔融纺丝合金的磁性特性差异表明，即使在化学计量比和样品制备方法上稍有变化，也会影响补偿系统的物理性质。 显示英文摘要

摘要： High TC fully compensated ferrimagnets are potential candidates for spin transfer torque based spintronic devices. We report the structural and magnetic properties of high TC fully compensated ferrimagnets Mn2V0.5Co0.5Z where Z is Ga, Al, in the melt spun ribbon and arc melted bulk form. While the parent alloys Mn2YZ where Y is V, Co and Z is Ga, Al exhibits a magnetic moment value around 2 muB per f.u, the Mn2V0.5Co0.5Ga alloy exhibits room temperature nearly fully compensated moment value of 0.09 and 0.13 muB per f.u. in the bulk and ribbon form respectively. For Mn2V0.5Co0.5Al this turned out to be 0.04 and 0.08 muB per f.u. In Contrast to the bulk sample's Neel P type ferrimagnetic behaviour, ribbon samples exhibit Neel N type ferrimagnetic characteristic with a high compensation temperature of 420 K for Ga alloy and 275 K for Al alloy. The observed TC values are more than 640 K for all samples. The differences in the magnetic properties of arc melted and melt spun alloys indicates that even a slight variation in stoichiometry and sample preparation method can influence the physical properties of a compensated system.