Competing A‐site and B‐site doping effects on magneto‐transport of RE0.55 Sr0.45 Mn1−x Rux O3 manganites in the vicinity of the SGI and FMM border. Issue 10 (25th July 2013)

• Record Type: Journal Article
• Authors: 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.
• Is Part Of: Physica status solidi. Volume 250:Issue 10(2013:Oct.)
• Page Start: 2158
• Page End: 2162
• Publication Date: 2013-07-25
• Subjects: Solid state physics -- Periodicals; Solids -- Periodicals; Atomic structure -- Periodicals; 530.41
• DOI: 10.1002/pssb.201350013
• Languages: English
• ISSNs: 0370-1972

Abstract

<abstract abstract-type="main" xml:lang="en"> <title> <x xml:space="preserve">Abstract</x> </title> <sec id="pssb201350013-sec-0001" sec-type="section"> <p>Competing effects of the A—site and B—site doping on the magneto—transport have been investigated in RE_0.55Sr_0.45Mn_1−xRu_xO₃ (0 ≤ x ≤ 0.25) manganites with RE (A—site) = Gd_ySm_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 &gt; 0.5. For y ≤ 0.5, Ru improves the metallicity compared to the Ru—undoped system. For y &gt; 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 <italic>y</italic>, the percolation is suppressed when the Ru concentration <italic>x</italic> exceeds ∼16% to 18%.</p> </sec> </abstract>