TbNiAl合金磁热效应研究  

Study on the Magnetocaloric Effect of TbNiAl Alloy

作　　者：胡义嘎[1] 欧志强[2] 萨茹拉[2] 柴万东[1] 王智军[1] 特古斯[2] 

机构地区：[1]赤峰学院物理与电子信息工程学院,内蒙古赤峰024000 [2]内蒙古师范大学内蒙古自治区功能材料物理与化学重点实验室,内蒙古呼和浩特010022

出　　处：《稀土》2014年第3期69-71,共3页Chinese Rare Earths

基　　金：国家自然科学基金项目资助(51161017);中国与荷兰合作交流项目资助(2012)

摘　　要：用真空电弧熔炼法制备了TbNiAl合金。X-射线衍射结果表明,TbNiAl的物相结构为ZrNiAl-型六角结构。磁性研究表明该合金为反铁磁体,奈尔温度为TN=47 K,在47 K以下也有一个小峰,说明反铁磁性为复杂结构,并且具有磁场引起的场致反铁磁到铁磁的转变。转变的临界磁场较小。通过测量不同温度的等温磁化曲线,确定了该转变附近的磁热效应。磁热效应由两部分组成,正磁热效应和反磁热效应。The TbNiAl alloy was synthesied using vacuum arc-melting method. X-ray diffraction shows TbNiAl alloy crystallizes in ZrNiAl-type hexagonal structure. Magnetization study shows an antiferromagnetic property with Néel temperture TN= 47 K. A secondary transitionat 17 K was observed,indicating antiferromagnetic structure is complex. A field induced antiferro-ferro magnetic transition with low critical field was observed. The magnetocaloric effect was determined using isothermal magnetization data at different temperatures. The magnetocaloric effect in this alloy consists of two parts,normal and inverse magnetocarloric effect.

关 键 词：TbNiAl合金 反铁磁 相对制冷能力 磁熵变 稀土 

分 类 号：TM271[一般工业技术—材料科学与工程]