Send to

Choose Destination
Sci Rep. 2017 Apr 4;7:45814. doi: 10.1038/srep45814.

New insight into magneto-structural phase transitions in layered TbMn2Ge2-based compounds.

Author information

Institute for Superconducting and Electronic Materials, Innovation Campus, University of Wollongong, NSW 2500, Australia.
State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, People's Republic of China.
College of Physics, Jilin University, Changchun 130012, People's Republic of China.
School of Physical, Environmental and Mathematical Sciences, UNSW Canberra at the Australian Defence Force Academy, ACT 2600, Australia.
Department of Physics, Shanghai University, 99 Shangda Road, Shanghai, 200444, China.


The Tb1-xYxMn2Ge2 series (x = 0, 0.1, 0.2) compounds are found to exhibit two magnetic phase transitions with decreasing temperature: from the paramagnetic state to the antiferromagnetic interlayer state at TNinter and from an antiferromagnetic interlayer structure to a collinear ferrimagnetic interlayer structure at TCinter. Compared with the slight change of TNinter (409 K, 410 K and 417 K for x = 0, 0.1 and 0.2 respectively), the replacement of Y for Tb leads to a significant decrease in TCinter from 97.5 K for x = 0 to 74.6 K for x = 0.2. The variation in TCinter can be ascribed to the combination of two effects: (1) chemical pressure and (2) magnetic dilution effect by Y substitution for Tb. Besides, a strong anisotropic magnet-volume effect has been detected around TCinter in all compounds with Δa/a = 0.125%, 0.124% and 0.130% for x = 0, 0.1 and 0.2, respectively while no obvious effect is detected along the c-axis. The maximum magnetic entropy change were found to be -ΔSmax = 9.1 J kg-1 K-1, 11.9 J kg-1 K-1 and 6.3 J kg-1 K-1 with a field change from 0 T to 5 T for x = 0, 0.1, 0.2 respectively.

Supplemental Content

Full text links

Icon for Nature Publishing Group Icon for PubMed Central
Loading ...
Support Center