Temperature dependence of magnetisation of intermetallic compound GdFe11Ti in different structural states

Abstract The temperature dependence of magnetisation σ ( T ) and the structure of GdFe 11 Ti intermetallic compound in coarse-grained, microcrystalline, and nanocrystalline states are investigated experimentally. It is found that thermal stability of GdFe 11 Ti compound depends on grain size. The phase composition of the coarse-grained sample remains unchanged upon heating to 1100 K. Microcrystalline powder with a grain size of ∼1 μm undergoes partial decomposition and transformation into iron phase during grinding and upon heating in the temperature range 800–1100 K. By contrast, heating of bulk nanocrystalline sample up to 1100 K partially restores phase composition. © 2001 Elsevier Science. All rights reserved