Antiferromagnetic transition of the caged compound TmTi2Al20

International Conference on Strongly Correlated Electron Systems 2014

Kase, Naoki^1,2 ; Shimura, Yasuyuki^1 ; Kittaka, Shunichiro^1 ; Sakakibara, Toshiro^1 ; Nakatsuji, Satoru^1 ; Nakano, Tomohito^2 ; Takeda, Naoya^3 ; Akimitsu, Jun^4

Institute for Solid State Physics, University of Tokyo, Kashiwa

277-8581, Japan^1

Graduate School of Science and Technology, Niigata University, Niigata

950-2181, Japan^2

Department of Materials Science and Technology, Niigata University, Niigata

950-2181, Japan^3

Department of Physics and Mathematics, Aoyama-Gakuin University, Sagamihara

252-5258, Japan^4

关键词: Antiferromagnetic orderings;    Antiferromagnetic transition;    Caged compounds;    Low field;    Low temperatures;    Magnetic entropy;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/592/1/012052/pdf
DOI  :  10.1088/1742-6596/592/1/012052

来源: IOP

【 摘 要 】

We examined the low temperature magnetic properties of a single crystal of TmTi2Al20, a hole analogue of PrTi2Al20, by means of specific heat C(T) and magnetization M(T, H) measurements. At low field, an anomaly that can be ascribed to an antiferromagnetic ordering is observed in M(T) at TN=0.7 K. C(T) shows a very sharp λ-type anomaly at 0.7 K, confirming the phase transition. From the calculated magnetic entropy S(T), we found that the ground state of TmTi2Al20is likely to be a magnetic Γ5triplet in the J =6 multiplet.