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Ferromagnetic feature from Mn near room temperature in the fine particles of GdMn2Ge2 and TbMn2Ge2

Authors
  • Mukherjee, K.
  • Iyer, Kartik K
  • Sampathkumaran, E. V.
Type
Preprint
Publication Date
Jan 27, 2010
Submission Date
Jan 27, 2010
Identifiers
DOI: 10.1209/0295-5075/90/17007
Source
arXiv
License
Yellow
External links

Abstract

The magnetization behaviors of GdMn2Ge2 and TbMn2Ge2 in the bulk and in the fine particles obtained by high-energy ball-milling are compared. Pronounced modificayions in the spontaneous, remnent and high-field magnetization in the fine particle form, attributable to Mn are observed. The results indicate that the antiferromagnetism of Mn sub-lattice known for the bulk form in the range 100-300 K gets weakened in favor of ferromagnetism in the fine particles. On the basis of this observation, we infer that there are other factors like size (and possibly defects) also play a role to decide the exact nature of magnetic ordering of Mn in this ternary family of compounds, contrasting the traditionally held view that the basal plane Mn-Mn distance is the crucial controlling parameter.

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