Metamagnetic behaviors in RRu2Al10(R = Tb, Dy, Ho) single crystals

International Conference on Strongly Correlated Electron Systems 2014

Mizushima, Toshio^1 ; Watanabe, Yuuya^1 ; Ejiri, Jun-Ichi^1 ; Kuwai, Tomohiko^1 ; Isikawa, Yosikazu^1

Graduate School of Science and Engineering, University of Toyama, Toyama

930-8555, Japan^1

关键词: Antiferromagnetic transition;    Applied magnetic fields;    Magnetic specific heat;    Magnetic transitions;    Magnetization curves;    Metamagnetic behavior;    Nuclear contribution;    Temperature dependence;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/592/1/012051/pdf
DOI  :  10.1088/1742-6596/592/1/012051

来源: IOP

【 摘 要 】

We measured the magnetization M and the specific heat C of TbRu2Al10, DyRu2Al10and HoRu2Al10single crystals. We observed antiferromagnetic transitions at the temperature T = 15 K for TbRu2Al10, 6.5 and 5.1 K for DyRu2Al10and 5.0 K for HoRu2Al10in the temperature dependences of M divided by the applied magnetic field, M/H. The magnetization curves exhibit metamagnetic behaviors below their magnetic transitions of all materials. M of TbRu2Al10at T =2 K along the c-axis shows the metamagnetic behavior at H =1.2, 1.6 and 3.2 T and shows a complex behavior with small jumps around H =4, 5 and 6.2 T along the a-axis. As for DyRu2Al10, the metamgnetic behaviors were observed at H =0.16, 1.35 and 1.8 T along the c-axis. In addition to the magnetic transitions at T =5.1 and 6.5 K, we observed an unusual drop around 2 K in the temperature dependence of M/H and correspondingly a kink in the magnetic specific heat at T =1.5 K. As for the specific heat of HoRu2Al10, an upturn due to a nuclear contribution in the specific heat was observed below 1.5 K.