title: Antiferromagnetic ordering in EuPtGe3.
abstract: The magnetic properties of single crystalline EuPtGe(3), crystallizing in the non-centrosymmetric BaNiSn(3)-type crystal structure, have been studied by means of magnetization, electrical resistivity, heat capacity and (151)Eu Mössbauer spectroscopy. The susceptibility and heat capacity data indicate a magnetic transition at T(N) = 11 K. The Mössbauer data confirm this conclusion, but evidence a slight first-order character of the transition. Analysing the magnetization data using a mean field model with two antiferromagnetically coupled sublattices allows us to explain some aspects of the magnetic behaviour, and to derive the first- and second-neighbour exchange integrals in EuPtGe(3).
authors.affiliation: Department of Condensed Matter Physics and Materials Science, Tata Institute of Fundamental Research, Colaba, Mumbai, India. goyal@tifr.res.in
authors.forename: Neeraj
authors.initials: N
authors.lastname: Kumar
authors.forename: Pranab Kumar
authors.initials: PK
authors.lastname: Das
authors.forename: R
authors.initials: R
authors.lastname: Kulkarni
authors.forename: A
authors.initials: A
authors.lastname: Thamizhavel
authors.forename: S K
authors.initials: SK
authors.lastname: Dhar
authors.forename: P
authors.initials: P
authors.lastname: Bonville