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, cilt.34, sa.2, ss.507-518, 2021 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 34 Sayı: 2
  • Basım Tarihi: 2021
  • Doi Numarası: 10.1007/s10948-020-05701-0
  • Dergi Adı: JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
  • Derginin Tarandığı İndeksler: 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
  • Sayfa Sayıları: ss.507-518
  • Anahtar Kelimeler: Cobaltites, Microstructural study, Magnetic behavior, Critical exponents, MAGNETOCALORIC PROPERTIES, CURIE TEMPERATURES, CRITICAL EXPONENTS, PHASE-TRANSITION, LA1-XSRXCOO3, ORDER, MAGNETORESISTANCE
  • Çukurova Üniversitesi Adresli: Evet

Özet

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).