Article

Anomalous magnetic field dependence of magnetocaloric effect at low temperature in Pr0.52Sr0.48MnO3 single crystal

Department of Solid State Physics, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700 032, India
Journal of Applied Physics (impact factor: 2.17). 05/2010; DOI:10.1063/1.3340524 pp.076101 - 076101-3
Source: IEEE Xplore

ABSTRACT We report the magnetocaloric effect (MCE) in a Pr 0.52 Sr 0.48 MnO 3 single crystal. A peak in the temperature dependence of magnetic entropy change (ΔS M ) with a fairly large negative value (≈3.8 J / kg   K ) is observed at 275 K close to Curie temperature. MCE is spread over a wide temperature range resulting in a considerable refrigerant capacity (≈293 J / kg ) . At low temperature the sign of ΔS M changes, below which anomalous field dependence of ΔS M is observed indicating the coexistence of ferromagnetic and antiferromagnetic interactions. Interplay between the interactions is strongly influenced by direction and magnitude of applied magnetic field in the ordered state.

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Keywords

anomalous field dependence
 
antiferromagnetic interactions
 
coexistence
 
considerable refrigerant capacity
 
Curie temperature
 
ferromagnetic
 
interactions
 
large negative value
 
low temperature
 
magnetic entropy change
 
magnetic field
 
magnetocaloric effect
 
MCE
 
ordered state
 
temperature dependence
 
wide temperature range
 
ΔS<sub> M </sub> changes