Annealing temperature dependence of crystalline structure and magnetic properties in nano-powder strontium-substituted cobalt ferrite

Budi Purnama, Retna Arilasita, Nilam Rikamukti, Utari, Sri Budiawanti, Suharno, Agung Tri Wijayanta, Suharyana, Dede Djuhana, Edi Suharyadi, Terumitsu Tanaka, Kimihide Matsuyama

Research output: Contribution to journalArticlepeer-review

Abstract

Strontium-substituted cobalt ferrite nanoparticles were synthesised via the co-precipitation method. Thermogravimetric analysis (TGA) showed that the relative reduction of the mass was supported by the available strontium cations. X-ray diffraction analyses clarified that single-phase nanoparticles were obtained and indicated that the strontium cations substituted metal cations in the cobalt ferrite nanoparticle system. The crystallite size increased on increasing the annealing temperature. By contrast, the crystalline stress decreased on increasing the annealing temperature. Furthermore, the saturated magnetisation decreased with an increased annealing temperature. Finally, the annealing temperature dependence of the coercive field is shown in this paper and the highest coercive field, HC, of 2.76 kOe is obtained for Sr0.1Co0.9Fe2O4 nanoparticles with an annealing temperature of 1000 °C. Here, the Sr2+ cations facilitate the high value of the anisotropic magnetic realisation for the whole annealing temperature treatment.

Original languageEnglish
Article number100862
JournalNano-Structures and Nano-Objects
Volume30
DOIs
Publication statusPublished - Apr 2022

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

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