首页|Improved magnetocaloric effects in AlFe2B2 intermetallics through the enhancement of magnetoelastic coupling

Improved magnetocaloric effects in AlFe2B2 intermetallics through the enhancement of magnetoelastic coupling

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  • NSTL
  • Elsevier
? 2022 Elsevier B.V.The development of high-performance magnetocaloric material is one of the keys to actualize the room-temperature magnetic refrigeration technology. Here the effects and mechanisms of solidification behaviors and microstructures on the magnetocaloric effect (MCE) of AlFe2B2 intermetallics are investigated. The solidification behaviors of AlxFe2B2 (x = 1.0, 1.2, 1.4, 1.6, and 1.8) were regulated via controlling the content of Al element, that is, peritectic reaction for x < 1.4 and direct crystallization for x ≥ 1.4. The magnetic entropy changes under an applied magnetic field of 5 T of AlFe2B2 intermetallics prepared by peritectic reaction can reach 7.2 J kg?1K?1 near room-temperature, which is much larger than that of direct crystallization samples (~5 J kg?1K?1). The reason is attributed to the abrupt change of crystal cells and its effect on the magnetoelastic coupling. The present work provides a new perspective to accurately control the MCE of AlFe2B2 phase, which is beneficial for its further practical application.

AlFe2B2 phaseMagnetocaloric effectMagnetoelastic couplingMicrostructuresSolidification behaviors

Han K.、Wang J.-Q.、Li M.、Gao M.、Wang X.、Huo J.

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CAS Key Laboratory of Magnetic Materials and Devices and Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences

2022

10.1016/j.jallcom.2022.164663

Journal of Alloys and Compounds

Journal of Alloys and Compounds

EISCI
ISSN：0925-8388
年,卷(期)：2022.908
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