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Title: Suppression of the metal-insulator transition by magnetic field in (Pr{sub 1−y}Y{sub y}){sub 0.7}Ca{sub 0.3}CoO{sub 3} (y = 0.0625)

The (Pr{sub 1−y}Y{sub y}){sub 0.7}Ca{sub 0.3}CoO{sub 3} compound (y = 0.0625, T{sub MI-SS}=40 K), 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 T{sub MI-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 T{sub MI-SS} with increasing field strength and a complete suppression of the MI-SS transition in fields above 9 T.
Authors:
;  [1] ; ;  [2] ; ; ;  [3]
  1. Faculty of Engineering, Iwate University, Morioka 020-8551 (Japan)
  2. Institute for Materials Research, Tohoku University, Sendai 980-8577 (Japan)
  3. Institute of Physics, ASCR, Cukrovarnická 10, 162 00 Prague 6 (Czech Republic)
Publication Date:
OSTI Identifier:
22304017
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 23; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CALCIUM COMPOUNDS; COBALT COMPOUNDS; ELECTRIC CONDUCTIVITY; HYSTERESIS; MAGNETIC FIELDS; MAGNETIZATION; OXYGEN COMPOUNDS; PRASEODYMIUM COMPOUNDS; SPIN; TRANSITION TEMPERATURE; YTTRIUM COMPOUNDS