Magnetic ordering in semiconducting Tl0.53K0.47Fe1.64Se2 single crystals studied by Mossbauer spectroscopy

作者：Stadnik, Zbigniew M.^*; Wang, Pu; Zukrowski, Jan; Wang, Hang-Dong; Dong, Chi-Heng; Fang, Ming-Hu

来源：Journal of Physics: Condensed Matter , 2012, 24(24): 245701.

DOI：10.1088/0953-8984/24/24/245701

• HYPERFINE FIELDS
• SUPERCONDUCTIVITY

The results of a Fe-57 Mossbauer spectroscopy study between 4.5 and 523.2 K and in external magnetic fields (up to 90 kOe) of semiconducting Tl0.53K0.47Fe1.64Se2 single crystals are reported. Evidence is provided for a possible phase separation into the magnetic majority and minority phases. It is demonstrated that the magnetic moments of the divalent Fe atoms located at the 16i site (space group I4/m) of the majority phase and of the minority phase are antiferromagnetically ordered, with the Neel temperature T-N = 518.0(3.6) K. The magnetic moments at 5.0 K of 2.09(1) and 2.28(2) mu(B) in these two phases are tilted from the crystallographic c axis by 18(1)degrees and 32(2)degrees, respectively. The Debye temperature of Tl0.53K0.47Fe1.64Se2 is found to be 228(4) K.

• 出版日期2012-6-20
• 单位杭州师范大学; 浙江大学