School of Basics Sciences, Indian Institute of Technology-Bhubaneswar, Bhubaneswar 751013, India.
J Phys Condens Matter. 2011 Dec 14;23(49):496001. doi: 10.1088/0953-8984/23/49/496001. Epub 2011 Nov 17.
We present magnetic characterization of a binary rare-earth intermetallic compound Er(5)Si(3), crystallizing in Mn(5)Si(3)-type hexagonal structure, through magnetization, heat capacity, electrical resistivity and magnetoresistance measurements. Our investigations confirm that the compound exhibits two magnetic transitions with decreasing temperature, the first one at 35 K and the second one at 15 K. The present results reveal that the second magnetic transition is a disorder-broadened first-order transition, as shown by thermal hysteresis in the measured data. Another important finding is that, below 15 K, there is a magnetic-field-induced transition with a hysteretic effect with the electrical resistance getting unusually enhanced at this transition and the magnetoresistance is found to exhibit intriguing magnetic-field dependence, indicating novel magnetic phase coexistence phenomenon. It thus appears that this compound is characterized by interesting magnetic anomalies in the temperature-magnetic-field phase diagram.
我们通过磁化、热容、电阻率和磁阻测量，对二元稀土金属间化合物 Er(5)Si(3)进行了磁性表征，该化合物在 Mn(5)Si(3)-型六方结构中结晶。我们的研究证实，该化合物在温度降低时表现出两个磁转变，第一个在 35 K，第二个在 15 K。目前的结果表明，第二个磁转变是无序展宽的一级相变，正如测量数据中的热滞后所显示的那样。另一个重要的发现是，在 15 K 以下，存在一个磁场诱导的转变，具有滞后效应，在这个转变中电阻异常增强，而磁阻表现出有趣的磁场依赖性，表明存在新的磁相共存现象。因此，似乎该化合物在温度-磁场相图中表现出有趣的磁性异常。
