3 years ago

A comprehensive study on thermal stability and magnetic properties of MnZn-ferrite nanoparticles

S. Mallesh, V. Srinivas

Publication date: Available online 9 November 2018

Source: Journal of Magnetism and Magnetic Materials

Author(s): S. Mallesh, V. Srinivas


Nanoparticles of MnxZn1-xFe2O4 (0≤x≤1.0) compositions were synthesized via sol-gel process. The structure, thermal stability and magnetic properties of as-prepared and annealed samples have been investigated. Although, as-prepared and 1200 °C air annealed samples exhibit cubic spinel ferrite phase , they decompose into α-Fe2O3, or/and α-Mn2O3 phases along with the poor quality of ferrite phase on annealing at 600 °C in air. Present investigations show that the stability of spinel ferrite phase is sensitive to (i) Mn concentration (ii) the annealing temperature and (iii) environments (air, Oxygen and Argon atmosphere) in which annealing experiments were carried out. A comparative study of structural and magnetic properties of Argon and air annealed samples suggest that differential oxygen partial pressure plays a significant role in stability as well as magnetic properties. Therefore, we suggest the deterioration of magnetic properties in Mn-Zn ferrite nanoparticles is due to depletion of Fe3+ ions from spinel structure that affects the cation distribution. It is also shown that magnetic properties can be tuned by controlling the process conditions. From these studies we propose a phenomenological model which explains the observation of present study.

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.