Effect of high temperature sintering on the structural and the magnetic properties of La1.4Ca1.6Mn2O7

E. Taşarkuyu*, A. Coşkun, A. E. Irmak, S. Aktürk, G. Ünlü, Y. Samanciolu, A. Yücel, C. Sarikürkçü, S. Aksoy, M. Acet

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

51 Citations (Scopus)

Abstract

We investigate the effect of sintering temperature on the structural and magnetic properties of La1.4Ca1.6Mn2O 7 double perovskite manganite compound prepared by the sol-gel route. Three sintering temperatures (1273, 1473 and 1673 K) are utilized for the heat treatment. Regardless of the sintering temperature, the tetragonal crystal structure with the I4/mmm space group is stable. However, a reduction in a and an increase in c lattice parameters along with a significant increase in crystallite-size occur on increasing the sintering temperature. This is also accompanied by the growth of grains. Grain-growth and changing crystallite-sizes account for the changes in magnetization, Curie temperature and magnetic entropy-change values. As the sintering temperature increases from 1273 to 1673 K the Curie temperature increases from 225 to 268 K and the magnetic entropy-change increases from 0.58 to 3.1 J kg-1 K-1 respectively.

Original languageEnglish
Pages (from-to)3717-3722
Number of pages6
JournalJournal of Alloys and Compounds
Volume509
Issue number9
DOIs
Publication statusPublished - 3 Mar 2011
Externally publishedYes

Keywords

  • Curie temperature
  • Magnetocaloric effect
  • Perovskite manganites
  • Sintering temperature

Fingerprint

Dive into the research topics of 'Effect of high temperature sintering on the structural and the magnetic properties of La1.4Ca1.6Mn2O7'. Together they form a unique fingerprint.

Cite this