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Title: Influence of rare earth doping on the structural and electro-magnetic properties of SmFeAsO0.7F0.3 iron pnictide
Authors: Anooja, J. B.
Aswathy, P. M.
Varghese, Neson
Chandrakanth, C. K.
Kumar, N. Devendra
Sundaresan, A.
Syamaprasad, U.
Keywords: Inorganic & Nuclear Chemistry
Ac Susceptibility
43 K
Issue Date: 2015
Publisher: Chinese Chemical Society
Citation: Inorganic Chemistry Frontiers
Anooja, J. B.; Aswathy, P. M.; Varghese, N.; Chandrakanth, C. K.; Kumar, N. D.; Sundaresan, A.; Syamaprasad, U., Influence of rare earth doping on the structural and electro-magnetic properties of SmFeAsO0.7F0.3 iron pnictide. Inorganic Chemistry Frontiers 2015, 2 (8), 731-740.
Abstract: The effects of rare earth site doping on the structural, superconducting and magnetic properties of SmFeAsO0.7F0.3 iron pnictide are investigated. Gd3+ and Ce3+ ions are chosen by virtue of their position being on either side of Sm3+. Doping of both smaller (Gd3+) and larger (Ce3+) ions at the Sm3+ site increases the T-C up to 55 K. Doping with the smaller Gd3+ results in lattice contraction and thereby enhances T-C. It is interesting to observe that though Ce3+ doping in SmFeAsO0.7F0.3 exhibits an increase in lattice parameters, a substantial enhancement of T-C occurs. The enhancement in T-C due to increased charge carrier concentration is also confirmed using Hall Effect measurement. Apart from T-C enhancement, the simultaneous doping of both at oxygen and rare earth sites prominently increases the superconducting properties such as J(C), H-C1 and H-C2. The co-doped samples also exhibit better magnetic field dependence of J(C) over the entire field of study. It is also observed that the Ce3+ doped sample shows higher J(C) in the high field region due to its enhanced flux pinning properties.
Description: Restricted access
ISSN: 2052-1553
Appears in Collections:Research Articles (Sundaresan A.)

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