Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8000367 | Journal of Alloys and Compounds | 2015 | 25 Pages |
Abstract
The magneto-transport and magnetocaloric effect in Pr2/3Sr1/3MnO3:Ag2O (PSMO:Ag) with Ag2O (10-30Â mol%) have been studied by resistivity and magnetization measurements. Temperature coefficient of resistance (TCR), magneto-resistance (MR) and magnetocaloric properties of the composite have shown different responses to Ag addition. Rietveld refinement confirms single phase crystalline structure with orthorhombic Pbnm space group and presence of silver metal as well. TCR changes randomly with Ag, increasing initially to 7.8%Â Kâ1 for PSMO:Ag10 composite which then decreases marginally with increasing Ag content. MR has been found to reach a maximum value of 30.5% at 1Â T applied field for PSMO:Ag10 composite. Magnetic entropy change (ÎSM) increases with increasing Ag content and is found to be 3.5Â JÂ kgâ1Â Kâ1 (1Â T), 6.1Â JÂ kgâ1Â Kâ1 (2Â T) and 8.4Â JÂ kgâ1Â Kâ1 (3Â T) for PSMO:Ag30 composite at 285Â K. The maximum refrigeration capacity of 39.5Â JÂ kgâ1 (1Â T), 91.0Â JÂ kgâ1 (2Â T) and 107.7Â JÂ kgâ1 (3Â T) has been found for the PSMO:Ag20 composite. PSMO:Ag composite exhibits potential for bolometric, magnetic sensing and magnetic refrigerating applications near room temperature.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Ramesh Chandra Bhatt, V.P.S. Awana, H. Kishan, P.C. Srivastava,