Microstructural Analysis, Magnetic Properties, and Critical Behavior of La(0.7)Ba(0.15)Sr(0.15)CoO(3)Perovskite

Alzahrani B., Akça G., Hcini S., Bouazizi M. L.

JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM, vol.34, no.2, pp.507-518, 2021 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 34 Issue: 2
  • Publication Date: 2021
  • Doi Number: 10.1007/s10948-020-05701-0
  • Journal Name: JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Applied Science & Technology Source, Chemical Abstracts Core, Communication Abstracts, Compendex, Computer & Applied Sciences, INSPEC, Metadex, Civil Engineering Abstracts
  • Page Numbers: pp.507-518
  • Keywords: Cobaltites, Microstructural study, Magnetic behavior, Critical exponents, MAGNETOCALORIC PROPERTIES, CURIE TEMPERATURES, CRITICAL EXPONENTS, PHASE-TRANSITION, LA1-XSRXCOO3, ORDER, MAGNETORESISTANCE
  • Çukurova University Affiliated: Yes

Abstract

We have reported the sol-gel synthesis and microstructural, magnetic, magnetocaloric, and critical behaviors of La(0.7)Ba(0.15)Sr(0.15)CoO(3)cobaltite. The XRD data refined by Rietveld technology confirms that a sample has a pure perovskite phase with rhombohedral structure. We tested the magnetization curve near the phase transition temperature (T-C) from ferromagnetic (FM) to paramagnetic (PM), and made the Arrott diagram which confirmed the existence of the secondary phase transition. The obtained magnetic constants from hysteresis loop offer to the sample the possible use in some interesting technological applications. TheM(mu H-0,T) isothermal magnetizations have been analyzed to estimate the critical exponents (beta,gamma, and delta). We found that beta exponent is close to that of the mean-field model; however,gamma and delta exponents belong to an unconventional model. The reliability of the estimated critical exponents was checked from the magnetic field variations of the magnetic entropy change (- Delta S-m) and the relative cooling power (RCP).