Magnetic effect and chemical distribution study of LCMNO3 perovskite by photoelectron spectroscopy

Mourad Smari*, Youssef Moualhi, Yongfeng Tong, Said Mansour, Hedi Rahmouni

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

The crystal structure, x-ray photoemission spectroscopy, magnetic characteristics, and magnetocaloric performance of perovskite La0.55Ca0.45Mn0.8Nb0.2O3 (LCMNO) ceramic powder were analyzed. The orthorhombic structure with a Pnma space group was found as the main phase in the as-received compound after the XRD pattern refinement. The mixed-valence states of manganese were detected by x-ray photoemission spectroscopy (XPS). The analysis of the La3d line revealed the complex nature of the lanthanum states. The evaluation of Zero-Field-Cooled and Field-Cooled magnetization performance provided conclusive evidence for the existence of the antiferromagnetic Mn3O4 phase at a temperature of T-N = 42 K and the coexistence of CO- AFM and FM domains in LCMNO. Despite the observed significant (delta T-FWHM) value due to relatively low magnetic entropy change (Delta S-M), the relative cooling power (RCP) is relatively moderate. By adding Nb4+, the changes in Mn valences and their effect on the magnetic cooling effect are lessened.
Original languageEnglish
Article number025907
Number of pages11
JournalPhysica Scripta
Volume99
Issue number2
DOIs
Publication statusPublished - 1 Feb 2024

Keywords

  • Charge ordering
  • Electrical resistivity
  • Magnetocaloric effect
  • Manganite
  • Semi-conductor behavior

Fingerprint

Dive into the research topics of 'Magnetic effect and chemical distribution study of LCMNO3 perovskite by photoelectron spectroscopy'. Together they form a unique fingerprint.

Cite this