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(Color online) characteristic of at . Black points: current sweep. Arrows denote the direction of current sweep. Red diamonds: voltage for time separated current pulses. Lines are guides to the eyes for the HR and LR regions.
(Color online) (a) Resistance measured with current pulses as a function of current at temperatures given in the figure. Arrows indicate transition. (b) Threshold current vs temperature. Red points and black diamonds stand for pulsed and dc measurements, respectively. Blue line shows Ohmic conductance .
(Color online) (a) Black line: magnetic susceptibility after zero field cooling measured in . Red dashed line: . (b) Temperature dependence of normalized resistance: (black line) and (blue line, with hysteresis) for . Points: for .
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