Synthesis and Magnetic Properties of L0.5Sr0.5Mn0.5M0.5O3 (L = Y, Pr; M = Cu, Ru) |
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| Authors: | N Balchev K Nenkov B Kunev J Pirov M Baychev and A Souleva |
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| Affiliation: | (1) Institute of Solid State Physics, Bulgarian Academy of Sciences, 1784 Sofia, Bulgaria;(2) Institut fur Festkorper- und Werkstofforschung, 01171 Dresden, Germany;(3) International Laboratory of High Magnetic Fields and Low Temperatures, 53-421 Wroclaw, Poland;(4) Institute of Catalysis, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria;(5) Central Laboratory of Photoprocesses, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria |
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| Abstract: | A new Mn-containing material with nominal composition L0.5Sr0.5Mn0.5M0.5O3 (L = Y or Pr; M = Cu or Ru), as well as Y0.5Sr0.5MnO3 for comparison, were synthesized. The results of the XRD and EDX analyses show that the obtained samples are single-phased and isostructural, with L1–xAxMnO3. The L0.5Sr0.5Mn0.5Cu0.5O3 material displays a PM behavior down to 8 K where paramagnetic–antiferromagnetic transition begins. The Pr0.5Sr0.5Mn0.5Cu0.5O3 sample has a broad transition at 210 K and a magnetoresistance of 34% at 128 K. The Pr0.5Sr0.5Mn0.5Ru0.5O3 material has a paramagnetic–ferromagnetic transition beginning at 330 K and a ferromagnetic–antiferromagnetic one at about 160 K. The obtained value of T
c is the highest for the Pr-containing manganites. The roles of Pr/Sr ratio, anisotropy, and intergranular effects in the samples are discussed. |
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| Keywords: | L0 5Sr0 5Mn0 5M0 5O3 paramagnetism ferromagnetism |
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