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

Research output: Contribution to journalArticlepeer-review

103 Citations (Scopus)

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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