title: Observation of Griffiths phase in antiferromagnetic La(0.32)Eu(0.68)MnO3.
abstract: We report the Griffiths phase (GP) scenario for isovalent doping in antiferromagnetic La(0.32)Eu(0.68)MnO(3). Rietveld refinement of structural data displays strong crystal structural distortion. The dc and ac magnetic studies nicely demonstrate unambiguous aspects of robust GP. The presence of ferromagnetically correlated spin clusters is found above the transition temperature, T(N). The disorder-driven phase inhomogeneity is correlated to strong structural distortion, giving rise to the GP. This is an unique example in manganite where double exchange interaction does not play any role for the observed phenomenon.
authors.affiliation: Department of Solid State Physics, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India.
authors.forename: A
authors.initials: A
authors.lastname: Karmakar
authors.forename: S
authors.initials: S
authors.lastname: Majumdar
authors.forename: S
authors.initials: S
authors.lastname: Kundu
authors.forename: T K
authors.initials: TK
authors.lastname: Nath
authors.forename: S
authors.initials: S
authors.lastname: Giri