Electrical resistivity anomaly in (Pr.sub.1-y./sub.M.sub.y./sub.)(.sub.1-x./sub.)Ca.sub.x./sub.CoO.sub.3./sub. epitaxial films (M=Y, Gd) fabricated by pulsed laser deposition

0470916 - FZÚ 2017 RIV US eng J - Článek v odborném periodiku
Noda, Y. - Fujishiro, H. - Naito, T. - Ito, A. - Goto, T. - Hejtmánek, Jiří - Jirák, Zdeněk
Electrical resistivity anomaly in (Pr_1-yM_y)(_1-x)Ca_xCoO₃ epitaxial films (M=Y, Gd) fabricated by pulsed laser deposition.
AIP Advances. Roč. 6, č. 2 (2016), 1-9, č. článku 025318. E-ISSN 2158-3226
Institucionální podpora: RVO:68378271
Klíčová slova: spin-state transition * thin-films
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
Impakt faktor: 1.568, rok: 2016

The (Pr1-yMy)(1-x)CaxCoO3 epitaxial films (M=Y, Gd) have been successfully fabricated by pulsed laser deposition on the single crystal substrates with different lattice constant. The polycrystalline bulk of this material shows a first-order metal-insulator (MI) transition below the critical temperature. Although rho(T) of all the as-grown films shows a semiconducting behavior at entire temperature range, an anomalous rho(T) upturn with wide hysteresis can be clearly seen for the film grown on the SrLaAlO4 (SLAO) substrate, which applied the in-plane compressive stress to the film. Such anomaly in rho(T) is interpreted as a sign of the first-order phase transition related with the spin-state (SS) transition, which was observed in the polycrystalline bulk.
Trvalý link: http://hdl.handle.net/11104/0268424