Investigation of the magnetocaloric properties of Bi doping in La0.7Ca0.27Na0.03Mn1-xBixO3 (x = 0.0, 0.005, 0.01 and 0.02) perovskites

Aslan M. S., AKÇA G., KILIÇ ÇETİN S., EKİCİBİL A.

Materials Science and Engineering: B, cilt.310, 2024 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 310
  • Basım Tarihi: 2024
  • Doi Numarası: 10.1016/j.mseb.2024.117760
  • Dergi Adı: Materials Science and Engineering: B
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Chemical Abstracts Core, Chimica, Communication Abstracts, Compendex, INSPEC, Metadex, Civil Engineering Abstracts
  • Anahtar Kelimeler: Magnetic entropy change, Magnetocaloric materials, Manganites, Perovskite, Relative cooling power
  • Çukurova Üniversitesi Adresli: Evet

Özet

In the present study, the effects of Bi doping on the Mn-site of La0.7Ca0.27Na0.03Mn1-xBixO3 perovskite manganites on their structural, magnetic, and magnetocaloric properties were investigated. From XRD analyses, the main La0.7Ca0.27Na0.03MnO3 manganite has a rhombohedral structure with space group R3¯c. In contrast, manganites obtained by doping with x = 0.005, 0.01, and 0.02 Bi were found to have an orthorhombic structure with space group Pnma. The Curie temperature (TC) is 310, 246, 235, and 232 K for x = 0.0, 0.005, 0.01 and 0.02, respectively. The maximum entropy change (-ΔSMmax) values were calculated as 6.34, 8.24, 8.33, and 8.42 Jkg-1K−1 for x = 0.0, 0.005, 0.01 and 0.02, respectively. The highest Relative Cooling Power (RCP) value was computed as 271 Jkg−1 for the sample with a Bi concentration of 0.01. It was determined from the H/M versus M2 curves that all samples displayed a second-order magnetic phase transition.