Impact of small Er rare earth element substitution on magnetocaloric properties of (La0.9Er0.1)(0.6)PB0.33MnO3 perovskite

Cetin S., Akça G., Ekicibil A.

JOURNAL OF MOLECULAR STRUCTURE, cilt.1196, ss.658-661, 2019 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 1196
  • Basım Tarihi: 2019
  • Doi Numarası: 10.1016/j.molstruc.2019.07.017
  • Dergi Adı: JOURNAL OF MOLECULAR STRUCTURE
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.658-661
  • Anahtar Kelimeler: Magnetocaloric effect, Magnetic refrigeration, Curie temperature, Manganites, MAGNETIC ENTROPY CHANGE, POLYCRYSTALLINE, TRANSITION
  • Çukurova Üniversitesi Adresli: Evet

Özet

In this work, the effect of Er substitution on the magnetic and magnetocaloric properties has been studied for (La0.9Er0.1)(0.6)PB0.33MnO3 perovskite synthesized by the sol-gel procedure. Magnetization measurements performed as a function of both temperature and magnetic field in order to determine magnetic and magnetocaloric properties. The temperature dependence of magnetization measured under 5 mT magnetic field indicate that sample exhibits ferromagnetic (FM) to paramagnetic (PM) transition with increasing temperature. The Curie temperature (T-C) decreases with Er-doping from 358 K for La0.67Pb0.33MnO3 to 349 K. From the isothermal magnetization measurements taken up to 5T around the T-C in 3 K intervals, the magnetic entropy change (Delta S-M) values of the sample have been determined for different magnetic fields. The Delta S(M)(max )value has been calculated as 0.98, 1.73, 2.33, 2.85 and 3.23 Jkg(-1)K(-1) for 1, 2, 3, 4 and 4.8 T, respectively. The type of magnetic phase transition has been determined as the second order from the slope of Arrott plots. (C) 2019 Elsevier B.V. All rights reserved.