We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Tuneable Magnetic Phase Transitions in Layered CeMn<sub>2</sub>Ge<sub>2-x</sub>Si<sub>x</sub> Compounds.
- Authors
Md Din, M. F.; Wang, J. L.; Cheng, Z. X.; Dou, S. X.; Kennedy, S. J.; Avdeev, M.; Campbell, S. J.
- Abstract
The structural and magnetic properties of seven CeMn2Ge2-xSix compounds with x = 0.0-2.0 have been investigated in detail. Substitution of Ge with Si leads to a monotonic decrease of both a and c along with concomitant contraction of the unit cell volume and significant modifications of the magnetic states - a crossover from ferromagnetism at room temperature for Ge-rich compounds to antiferromagnetism for Si-rich compounds. The magnetic phase diagram has been constructed over the full range of CeMn2Ge2-xSix compositions and co-existence of ferromagnetism and antiferromagnetism has been observed in CeMn2Ge1.2Si0.8, CeMn2Ge1.0Si1.0 and CeMn2Ge0.8Si1.2 with novel insight provided by high resolution neutron and X-ray synchrotron radiation studies. CeMn2Ge2-xSix compounds (x = 0, 0.4 and 0.8) exhibit moderate isothermal magnetic entropy accompanied with a second-order phase transition around room temperature. Analysis of critical behaviour in the vicinity of TCinter for CeMn2Ge2 compound indicates behaviour consistent with three-dimensional Heisenberg model predictions.
- Subjects
MICTOMAGNETISM; FERROMAGNETIC resonance; FERROMAGNETISM; SYNCHROTRON radiation; MAGNETIC properties
- Publication
Scientific Reports, 2015, p11288
- ISSN
2045-2322
- Publication type
Article
- DOI
10.1038/srep11288