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Paper detail

Magnetothermal cooling with a phase separated manganite

We show that temperature of a current (I = 20 mA) carrying manganite (Nd0.5Ca0.5Mn0.93Ni0.07O3) in presence of a magnetic field (H) decreases abruptly as much as deltaT = 45 K (7 K) accompanied by a step like decrease in magnetoresistance at a critical value of H when the base temperature is 40 K (100 K). The magnitude of deltaT and the position of magnetoresistance step decrease towards lower H with decreasing amplitude of the current. We discuss possible origins of the current and magnetic- field driven temperature change which may find applications in magnetothermal refrigeration besides magnetocaloric effect.

preprint2009arXivOpen access
A. RebelloR. Mahendiran
cond-mat.mtrl-sci
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A. RebelloR. Mahendiran

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