• O D Jayakumar

      Articles written in Pramana – Journal of Physics

    • Magnetic behaviour of TbMnFe

      Keka Chakraborty S K Paranjpe V Siruguri O D Jayakumar S K Kulshreshtha

      More Details Abstract Fulltext PDF

      Neutron diffraction and Mössbauer measurements have been carried out on the cubic Laves phase intermetallic TbMnFe. The magnetic moment on the transition metal atom is found to be low, 0.2µB, at room temperature. This moment is temperature independent down to 10 K. Magnetic moment on the rare earth atom varies from 2.5µB at 296 K to 7.27µB at 10 K. Mössbauer spectra recorded at 298 K and 78 K have magnetic character but there is a large distribution of hyperfine field values. Both these features arise due to magnetic frustration created in the sample due to the competing ferro and antiferromagnetic interactions between the transition metal atoms.

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