Competing A‐site and B‐site doping effects on magneto‐transport of RE 0.55  Sr 0.45  Mn 1− x   Ru  x   O 3  manganites in the vicinity of the  SGI  and  FMM  border | Zendy

Alagoz H. S. | Zendy; Živković I. | Zendy; Mahmud S. T. | Zendy; Saber M. M. | Zendy; Perrin G. | Zendy; Shandro J. | Zendy; Khan M. | Zendy; Zhang Y. | Zendy; Egilmez M. | Zendy; Jung J. | Zendy; Chow K. H. | Zendy

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Competing A‐site and B‐site doping effects on magneto‐transport of RE 0.55 Sr 0.45 Mn 1− x Ru x O 3 manganites in the vicinity of the SGI and FMM border

Author(s) -

Alagoz H. S.,

Živković I.,

Mahmud S. T.,

Saber M. M.,

Perrin G.,

Shandro J.,

Khan M.,

Zhang Y.,

Egilmez M.,

Jung J.,

Chow K. H.

Publication year - 2013

Publication title -

physica status solidi (b)

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.51

H-Index - 109

eISSN - 1521-3951

pISSN - 0370-1972

DOI - 10.1002/pssb.201350013

Subject(s) - doping , percolation threshold , percolation (cognitive psychology) , condensed matter physics , ferromagnetism , materials science , transition metal , electrical resistivity and conductivity , crystallography , analytical chemistry (journal) , chemistry , physics , catalysis , biochemistry , quantum mechanics , chromatography , neuroscience , biology

Competing effects of the A—site and B—site doping on the magneto—transport have been investigated in RE 0.55 Sr 0.45 Mn 1−x Ru x O 3 (0 ≤ x ≤ 0.25) manganites with RE (A—site) = Gd y Sm 1−y (0 ≤ y ≤ 1). The Ru (B—site)‐free system is a ferromagnetic metal (FMM) for y ≤ 0.5 and a spin—glass insulator (SGI) for y > 0.5. For y ≤ 0.5, Ru improves the metallicity compared to the Ru—undoped system. For y > 0.5, Ru—doping induces a transition from the SGI to FMM state, above a percolation threshold which depends strongly on the A—site substitution. Interestingly, irrespective of the A—site doping level y , the percolation is suppressed when the Ru concentration x exceeds ∼16% to 18%.

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