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  1. Home
  2. Indian Institute of Technology Madras
  3. Publication2
  4. Coexistence of ferri and ferromagnetism in cobalt substituted samarium iron garnet
 
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Coexistence of ferri and ferromagnetism in cobalt substituted samarium iron garnet

Date Issued
01-02-2022
Author(s)
Rohith Vinod, K.
Mathew, Nibin K.
Theertharaman, G.
Radha, R.
K Sethupathi 
Indian Institute of Technology, Madras
Saravanan, P.
Balakumar, S.
DOI
10.1016/j.mseb.2021.115521
Abstract
Samarium iron garnet (Sm3Fe5O12) is a potential but less explored ferromagnetic rare earth iron garnet. Cobalt substitution induced structural modifications that results enhancement in room temperature as well as low temperature magnetic behavior of Sm3Fe5O12 prepared by co-precipitation has been probed using superconducting quantum interface device. At room temperature, replacement of 0.3 atomic% Fe by Co improves the saturation value from 12.63 to 25.26 emu/g and the coercivity is found to be increased from 0.023 to 0.09 kOe. Similarly, at low temperature (∼5K) the enhancement in saturation magnetization and coercivity is found to be 17.62 to 31.23 emu/g and 1.55 to 2.32 kOe respectively. Rooted from the morphological modifications, the enhanced magnetism observed here might also be from the modifications in the super-exchange interaction and formation of oxygen vacancies due to the larger ionic radius of replaced Co2+ ions in the Fe3+ sites of Sm3Fe5O12.
Volume
276
Subjects
  • Cobalt substitution

  • Magnetic properties

  • Samarium iron garnet

  • Structural modificati...

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