中文摘要：

采用熔体快淬法制备了Gd96V4合金带材,利用X射线衍射（XRD）分析了熔体快淬带的相结构,通过综合物性测量系统（PPMS）研究了合金的磁性及磁热效应,并运用Landau理论分析了合金的磁性转变和比热.研究结果表明,Gd96V4合金完全保持了纯Gd的六方相结构,其居里温度为294.5K,在居里温度附近的磁特性符合二级相变规律;在5T外场下,最大磁熵变为9.35J/（kg·K）.在温度为294K时计算的比热△Cp为145.23J/（kg·K）.自发磁化强度M（0,0）=249.6emu/g,即每个分子式的饱和磁矩μS=6.8μB.与纯Gd相比,含少量V的Gd96V4合金具有较大的磁熵变,是一类有很大应用潜力的室温磁致冷材料.

英文摘要：

The Gd96V4 alloy was prepared by arc melt-spinning technique. The phase structure,magnetic properties and magnetocaloric effect （MCE） of the alloy were investigated by means of X-ray diffraction pattern （XRD）and the physical property measurement system （PPMS）,respectively. The magnetic phase transition and specific heat were analyzed based on Landau theory. The results shown that the sample maintains crystal hexagonal structure of pure Gd and the Curie temperature TC of the alloy is 294.5 K. The characteristic of magnetic properties of Gd96V4 alloy near its Curie temperature is the second order type. The magnetic entropy change of Gd96V4 alloy reaches the maximum of 9.35 J/（kg·K） with a magnetic field change of 0-5 T near its Curie temperature. The calculated specific heat △Cp=145.23 J/kg·K at T=294K is obtained and the spontaneous magnetization M（0,0） is 249.6 emu/g （μS=6.8 μB per Gd96V4 formula）. Compared with Gd,the Gd96V4 alloy can be potentially used as magnetocaloric materials for room temperature applications due to its relatively high MCE effect.