Pressure-induced changes in the structural and magnetic properties of YFe.sub.2./sub.D.sub.4.2./sub..

0366059 - FZÚ 2012 RIV US eng J - Journal Article
Isnard, O. - Paul-Boncour, V. - Arnold, Zdeněk - Colin, C.V. - Leblond, T. - Kamarád, Jiří - Sugiura, H.
Pressure-induced changes in the structural and magnetic properties of YFe₂D_4.2.
Physical Review. B. Roč. 84, č. 9 (2011), 094429/1-094429/10. ISSN 1098-0121
R&D Projects: GA ČR GA202/09/1027; GA ČR GA202/09/0030
Institutional research plan: CEZ:AV0Z10100521
Keywords : glass transitions of specific systems * X-ray diffraction * saturation moments * magnetic susceptibilities
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 3.691, year: 2011

The study of the structural and magnetic properties of YFe2D4.2 under high pressure has been performed by combining energy dispersive x-ray diffraction at room temperature up to 5.5 GPa, neutron diffraction studies at low temperature up to 2.5 GPa, and magnetization measurements up to 1 GPa. The monoclinic structure of YFe2D4.2 at ambient temperature and pressure is related to a distortion of the initial cubic C15 structure ofYFe2 by the ordering of inserted D atoms. A structural transition from monoclinic to cubic structure is observed at 4 GPa. The high pressure cubic YFe2D4.2 has a 19% higher cell volume than that of YFe2. The application of an external pressure leads to the progressive decrease of the transition temperature TM0 from ferro to antiferromagnetic order (TM0 = 84 K at ambient pressure) and even to the suppression of the ferromagnetic ground state for pressures larger than 0.54 GPa.
Permanent Link: http://hdl.handle.net/11104/0201152