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      https://www.ias.ac.in/article/fulltext/boms/044/0131

    • Keywords

       

      Magnetocaloric effect; manganite; Curie temperature; phase transition.

    • Abstract

       

      We experimentally study the structure, magnetic and magnetocaloric effect of Pr$_{0.5}$Sr${0.5}$Mn$_{1–x}$Co$_x$O$_3$ (0.00${\leq}$x${\leq}$ 0.08) with the substitution of Co. The results of the refined XRD data show that all the samples have a tetragonal structure with the I4/mcm space group. The small amount of Co substitution does not change the structure of the materials. However, the magnetization data indicate that the charge-ordered antiferromagnetic state vanishes with a small amount of Co substitution. The Curie temperature of samples can be effectively tuned with the substitution and it decreases from 270 to 175 K. With a magnetic field change of 15 kOe, the maximum magnetic entropy change (|${\varDelta}$$S$$_M$|max)of the samples increases to 1.21 J kg$^{-1}$ K$^{-1}$ at $T$$_C$ = 255 K for x = 0.02, and then decrease monotonically. All samples undergo second-order phase transition. The wide operating range makes our compounds as good refrigeration candidates.

    • Author Affiliations

       

      XINYAO LUO1 HANGFU YANG1 SIHAO HUA2 QIONG WU1 NENGJUN YU1 YUNDAN YU1 PENGYUE ZHANG1 HONGLIANG GE1

      1. Magnetism Key Laboratory of Zhejiang Province, China Jiliang University, Hangzhou 310018, China
      2. Zhejiang Fangyuan Test Group Co., LTD, Hangzhou 310018, China
    • Dates

       
  • Bulletin of Materials Science | News

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