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The Effects of Mn Substitution on Magnetization Reversal Properties in Gd0.7Ca0.3MnO3

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Abstract

Low temperature magnetization in polycrystalline Gd0.7Ca0.3Mn1−x M x O3 (M=Cr, Ga, Ru; x=0, 0.2) has been investigated. The samples were prepared via the conventional solid state reaction method. For all the samples, the paramagnetic to ferrimagnetic (PM-FiM) transition temperature (say T max) can be well defined from the temperature dependent ac susceptibility data. The negative magnetization suppresses due to 20 % Cr or Ga doping at the Mn site. On the other hand, below the compensation temperature (T comp), the nature of the Ru doping sample is almost similar to that of undoped Gd0.7Ca0.3MnO3. The nonmagnetic Ga doping drastically reduces magnetization and T max shifts to a lower temperature. However, Ru and Cr doping increase the value of T max. The network of canted Mn3+/Mn4+ moments changes with the substitution of Cr, Ga, and Ru at the Mn site giving rise to the variation of the internal magnetic moment. Thus, the antiparallel coupling of the Gd moments with Mn/M changes and affects the low temperature magnetization reversal properties.

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Acknowledgements

This work was partially supported by DST-PURSE and DST-FAST TRACK project No-SR/FTP/PS-101/2010 Government of India.

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Authors and Affiliations

  1. Department of Physics, University of Kalyani, Kalyani, Nadia, W.B., 741235, India

    Sanjay Biswas, Momin Hossain Khan & Sudipta Pal

  2. Department of Engineering Physics, BPPIMT, Kolkata, W.B., 700052, India

    Esa Bose

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  1. Sanjay Biswas
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  2. Momin Hossain Khan
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  3. Sudipta Pal
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  4. Esa Bose
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Correspondence to Sudipta Pal.

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Biswas, S., Khan, M.H., Pal, S. et al. The Effects of Mn Substitution on Magnetization Reversal Properties in Gd0.7Ca0.3MnO3 . J Supercond Nov Magn 27, 463–468 (2014). https://doi.org/10.1007/s10948-013-2284-3

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