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Updated: Jun 13, 2025
Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
Published on: June 7, 2018
Freezing of short-range ordered antiferromagnetic clusters in the CrFeTi2O7system
Arun Kumar1, Soumendra Nath Panja1, Lukas Keller2
1Department of Physics, Indian Institute of Science Education and Research (IISER), Pune 411008, India.
Abstract:
We report on the CrFeTi2O7(CFTO) system using a combination of x-ray diffraction, dc magnetization, ac susceptibility, specific heat and neutron diffraction measurements. CFTO is seen to crystallize in a monoclinicP21/asymmetry. It shows a glassy freezing atTf∼22 K, characterized by the observation of bifurcation between ZFC and FCχ(T) curves, frequency dispersion acrossTfin ac susceptibility, and follows Vogel-Fulcher and power law type critical dynamics, very slow relaxation of iso-thermal remanent magnetization with time and a linear temperature dependence of magnetic contribution to specific heatCmbelowTf. The microscopic neutron diffraction analysis of CFTO not only confirms the absence of long-range antiferromagnetic (AFM) ordering but also exhibits diffuse scattering due to the presence of short-range ordered AFM correlated spin clusters.
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