Néel temperature enhancement in nanostructured nickel zinc ferrite

N. Ponpandian, A. Narayanasamy, C. N. Chinnasamy, N. Sivakumar, J. M. Greneche, K. Chattopadhyay, K. Shinoda, B. Jeyadevan, K. Tohji

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Abstract

The Ńel temperature of Ni0.5 Zn0.5 Fe2 O4 spinel ferrite increases significantly from 538 K in the bulk state to 592 K when the grain size is reduced to 16 nm by milling in a high-energy ball mill. This has been attributed to an increase in the AB superexchange interaction strength due to a possible enhancement in the magnetic ion concentration in the A-site on milling, as is evident from extended x-ray absorption fine structure and in-field Mössbauer measurements.

Original languageEnglish
Article number192510
Pages (from-to)1-3
Number of pages3
JournalApplied Physics Letters
Volume86
Issue number19
DOIs
Publication statusPublished - 2005 May 9

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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    Ponpandian, N., Narayanasamy, A., Chinnasamy, C. N., Sivakumar, N., Greneche, J. M., Chattopadhyay, K., Shinoda, K., Jeyadevan, B., & Tohji, K. (2005). Néel temperature enhancement in nanostructured nickel zinc ferrite. Applied Physics Letters, 86(19), 1-3. [192510]. https://doi.org/10.1063/1.1925755