论文标题
抗铁磁铁U2RH2PB的磁相图
Magnetic phase diagram of the antiferromagnet U2Rh2Pb
论文作者
论文摘要
U2RH2PB的一种新的基于U的化合物，以单晶形式制备了U2T2X系列的新化合物。它的结构被确定为属于四方MO2FEB2结构类型，其沿C的U-U间距最短。 U2RH2PB在20 K的TN处进行抗铁磁过渡，并表现出增强的Sommerfeld系数150 MJ/molk2。与两个阳极类似物U2RH2IN和U2RH2SN相反，易于磁通的方向是C临界场的临界场4.3 T相当低的c spin-Flip Type的c。观察到的TN和HC对温度和磁场的依赖性已用于构建磁相图。实验观察结果主要由第一原理计算支持。
A new U-based compound of the U2Rh2Pb, a new compound of the U2T2X series was prepared in a single-crystal form. Its structure was determined as belonging to the tetragonal Mo2FeB2 structure type with the shortest U-U spacing along the c. U2Rh2Pb undergoes an antiferromagnetic transition at TN of 20 K and exhibits an enhanced Sommerfeld coefficient 150 mJ/molK2. In contrast to the two rhodium analogues U2Rh2In and U2Rh2Sn, the easy-magnetization direction is the c with rather low value of the critical field 4.3 T of the metamagnetic transition of a spin-flip type. The observed dependences of TN and Hc on temperature and magnetic field have been used for constructing a magnetic phase diagram. The experimental observations are mostly supported by first-principles calculations.
