Suppression of the metal-insulator transition by magnetic field in (Pr.sub.1-y./sub.Y.sub.y./sub.).sub.0.7./sub.Ca.sub.0.3./sub.CoO.sub.3./sub. (y=0.0625)

0435224 - FZÚ 2015 RIV US eng J - Článek v odborném periodiku
Naito, T. - Fujishiro, H. - Nishizaki, T. - Kobayashi, N. - Hejtmánek, Jiří - Knížek, Karel - Jirák, Zdeněk
Suppression of the metal-insulator transition by magnetic field in (Pr_1-yY_y)_0.7Ca_0.3CoO₃ (y=0.0625).
Journal of Applied Physics. Roč. 115, č. 23 (2014), "233914-1"-"233914-5". ISSN 0021-8979. E-ISSN 1089-7550
Grant CEP: GA ČR GA13-03708S
Institucionální podpora: RVO:68378271
Klíčová slova: metal-insulator transition * magnetic field * magnetic properties
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
Impakt faktor: 2.183, rok: 2014

The(Pr1-yYy)0.7Ca0.3CoO3 compound (y=0.0625, TMI-SS = 40K), at the lower limit for occurrence of the first-order metal-insulator (MI) and simultaneous spin-state (SS) transitions, has been studied using electrical resistivity and magnetization measurements in magnetic fields up to 17 T. The isothermal experiments demonstrate that the low-temperature insulating phase can be destabilized by an applied field and the metallic phase returns well below the transition temperature TMI-SS. The reverse process with decreasing field occurs with a significant hysteresis. The temperature scans taken at fixed magnetic fields reveal a parabolic-like decrease in TMI-SS with increasing field strength and a complete suppression of the MI-SS transition in fields above 9 T.
Trvalý link: http://hdl.handle.net/11104/0239130