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Metastability around the insulator-metal transition in
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View: Figures


Image of FIG. 1.
FIG. 1.

(a) Resistivity as a function of temperature at zero-field and at an applied fields of 2 and 50 kOe for cooling and heating sequences. (b) MR as a function of temperature for cooling and heating cycles for and 50 kOe. Arrows indicate the direction of temperature change.

Image of FIG. 2.
FIG. 2.

is plotted as a function of applied magnetic field at different constant temperature. Arrows indicate the direction of field change.

Image of FIG. 3.
FIG. 3.

(a) MR as a function of field recorded at 118 K. The measurement was performed by returning the field back to zero from different maximum fields . The inset shows the Landau-type free energy profile around the first order magneto-structural transition at different applied fields . “COI” and “FMM” denote minima corresponding to charge-order insulating and FMM phases, respectively. (b) Resistivity as a function of temperature with a protocol discussed in the text.

Image of FIG. 4.
FIG. 4.

Current-Voltage profile of the sample measured in zero-field and field-arrested state (created by application and subsequent removal of 5 kOe of field) at (a) 118 K (while cooling) and (b) 135 K (while heating). The solid lines represent fittings to the data by Eq. (1).

Image of FIG. 5.
FIG. 5.

(a) and (b) indicate magnetization vs field data at different temperatures. The signature of metamagnetic transition is clearly visible in the isotherms and the anomaly shifts to higher field with increasing temperature. (c) Depicts convoluted magnetization vs temperature plots obtained from the data. The change in entropy , calculated from the magnetization data, is plotted in (d).


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Metastability around the insulator-metal transition in La0.2Pr0.5Ca0.3MnO3