Abstract
NdBaMn2O6 exhibits a sequence of two following magnetic transitions: a second-order paramagnetic-ferromagnetic transition at TC =290 K, followed by a first-order ferromagnetic-antiferromagnetic transition around TN =210 K, leading to normal and inverse magnetocaloric effects (MCE), respectively. For ΔB=5 T, the combined -Δ SM max around TC and TN is found to be 2.5 J/kg K and 1.4 J/kgK, respectively. Moreover, the presence of these two -Δ SM peaks spanning over a broad range of temperature leads to a remarkably wide working temperature region, yielding a significant performance in terms of refrigerant efficiency. The present study demonstrates that adjusting the degree of A-site cation ordering in perovskite oxides is an efficient strategy to induce room-temperature MCE.
Original language | English |
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Article number | 242506 |
Journal | Applied Physics Letters |
Volume | 96 |
Issue number | 24 |
DOIs | |
State | Published - Jun 14 2010 |
Externally published | Yes |
Funding
This work has been supported by the European project “SOPRANO” under Marie Curie actions (Grant No. PITN-GA-2008-214040) and French project “PR Réfrigération Magnétique.”
Funders | Funder number |
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Seventh Framework Programme | 214040 |
Université Pierre et Marie Curie | PITN-GA-2008-214040 |