Coexistence of inverse and normal magnetocaloric effect in A-site ordered NdBaMn2 O6

Q. Zhang; F. Guillou; A. Wahl; Y. Bŕard; V. Hardy

doi:10.1063/1.3453657

Coexistence of inverse and normal magnetocaloric effect in A-site ordered NdBaMn₂ O₆

Q. Zhang, F. Guillou, A. Wahl, Y. Bŕard, V. Hardy

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32 Scopus citations

Abstract

NdBaMn₂O₆ exhibits a sequence of two following magnetic transitions: a second-order paramagnetic-ferromagnetic transition at T_C =290 K, followed by a first-order ferromagnetic-antiferromagnetic transition around T_N =210 K, leading to normal and inverse magnetocaloric effects (MCE), respectively. For ΔB=5 T, the combined -Δ SM max around T_C and T_N is found to be 2.5 J/kg K and 1.4 J/kgK, respectively. Moreover, the presence of these two -Δ S_M 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
Article number	242506
Journal	Applied Physics Letters
Volume	96
Issue number	24
DOIs	https://doi.org/10.1063/1.3453657
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.”

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title = "Coexistence of inverse and normal magnetocaloric effect in A-site ordered NdBaMn2 O6",

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.",

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T1 - Coexistence of inverse and normal magnetocaloric effect in A-site ordered NdBaMn2 O6

AU - Zhang, Q.

AU - Guillou, F.

AU - Wahl, A.

AU - Bŕard, Y.

AU - Hardy, V.

PY - 2010/6/14

Y1 - 2010/6/14

N2 - 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.

AB - 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.

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Coexistence of inverse and normal magnetocaloric effect in A-site ordered NdBaMn₂ O₆

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