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Title: Tuneable magnetic phase transitions in layered CeMn2Ge2-xSix compounds
Authors: Din, MFM
Wang, JL
Cheng, ZX
Dou, SX
Kennedy, SJ
Avdeev, M
Campbell, SJ
Keywords: Phase transformations
Magnetic properties
Magnetic materials
Neutron diffraction
X-ray diffraction
Issue Date: 19-Jun-2015
Publisher: Springer Nature
Citation: Md Din, M. F., Wang, J. L., Cheng, Z. X., Dou, S. X., Kennedy, S. J., Avdeev, M., & Campbell, S. J. (2015) Tuneable magnetic phase transitions in layered CeMn2Ge2-xSix compounds. Scientific Reports, 5(11288). doi:10.1038/srep11288
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. © 2021 Springer Nature Limited
ISSN: 2045-2322
Appears in Collections:Journal Articles

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