论文标题
观察第四纪小旋转器复合nifetisn中类似Griffiths的阶段
Observation of Griffiths-like phase in the quaternary Heusler compound NiFeTiSn
论文作者
论文摘要
季素赫斯勒化合物nifetisn可以被认为是源自ni的一个fe2tiSn的异国情调的伪造化合物fe2tisn。与表现出障碍诱导的铁磁相的Fe2TISN相反，Nifetisn的基态是抗铁磁性的，具有旋转倾斜的特征。有趣的是，Nifetisn显示了一个类似Griffiths的相，其特征是在达到抗铁磁状态之前，以孤立的铁磁簇为特征。从我们的粉末X射线衍射研究中可以明显看出，类似Griffiths的相可能与Fe和Ti位点之间的抗替站疾病有关。该化合物还显示了电阻率的异常温度依赖性，该系统可以由系统中的主要结构障碍来解释。事实证明，nifetisn是一个罕见的例子，在这种例子中，在半导体的3D过渡金属基的基于抗铁磁基态的金属金属间化合物中观察到了类似Griffiths的相。
The quaternary Heusler compound NiFeTiSn can be considered to be derived from the exotic pseudogap-compound Fe2TiSn by the replacement of one Fe atom by Ni. In contrast to Fe2TiSn, which shows a disorder-induced ferromagnetic phase, the ground state of NiFeTiSn is antiferromagnetic with the signature of spin canting. Interestingly, NiFeTiSn shows a Griffiths-like phase characterized by isolated ferromagnetic clusters before attaining the antiferromagnetic state. The Griffiths-like phase is possibly associated with the antisite disorder between Fe and Ti sites as evident from our powder X-ray diffraction study. The compound also shows rather an unusual temperature dependence of resistivity, which can be accounted for by the prevailing structural disorder in the system. NiFeTiSn turned out to be a rare example where a Griffiths-like phase is observed in a semiconducting 3d transition metal-based intermetallic compound with an antiferromagnetic ground state.
