The system Nd-Fe-Sb: Phase equilibria, crystal structures and physical properties
- Author(s)
- Andrij Grytsiv, Peter Franz Rogl, Dariusz Kaczorowski, Herta Silvia Effenberger
- Abstract
Phase equilibria within the isothermal section of the ternary system Nd-Fe-Sb were derived at 800 °C by using X-ray powder diffraction, light optical microscopy and electron probe microanalysis. Crystal structures of the ternary compounds Nd2Fe7-x Sb6-y (?2-orthorhombic), Nd2Fe5-x Sb10-y (?2-tetragonal) Nd3Fe3Sb7 (?3) and NdFeSb3 (?4) were determined by single crystal X-ray diffraction and by Rietveld X-ray powder data refinement. The phase ?2 was found to exhibit two modifications, orthorhombic (Nd2Fe7-x Sb6-y -type, S.G. Immm, a = 0.42632(6) nm, b = 0.43098(7) nm, c = 2.5823(3) nm) and tetragonal (La2Fe5-x Sb10-y -type, S.G. I4/mmm, a = 0.42897(2) nm, c = 2.5693(4) nm). Tetragonal and orthorhombic modifications form a crystallographic group-subgroup relation and are closely related to the Zr3Cu4Si6-type. Nd3Fe3Sb7 (?3) crystallizes with a unique structure type (S.G. P63/m, a = 1.31808(3) nm, c = 0.41819(3) nm), which is isopointal to the Cu10Sb3-type. NdFeSb3 (?4) adopts the LaPdSb3-type. Physical properties comprising magnetization, resistivity and specific heat were measured for RE2Fe5-x Sb10-y (RE = Ce, Nd), NdFeSb3 and Nd3Fe3Sb7. NdFeSb3 orders antiferromagnetically below 3.0 K due to the presence of magnetic moments on Nd sites. For the other compounds a more complex magnetic behaviour is observed at low temperatures that may be related to the contributions coming from both the rare earth and iron sublattices.
- Organisation(s)
- Department of Physical Chemistry, Department of Mineralogy and Crystallography
- External organisation(s)
- Polish Academy of Sciences
- Journal
- Intermetallics
- Volume
- 18
- Pages
- 2361-2376
- No. of pages
- 16
- ISSN
- 0966-9795
- DOI
- https://doi.org/10.1016/j.intermet.2010.08.037
- Publication date
- 2010
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 104017 Physical chemistry, 105113 Crystallography, 103018 Materials physics
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/191cdb54-df7a-4b52-92ab-f179bb2b567e