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journal article·2016-03-01Open access

Magnetocaloric effect in high Gd content Gd-Fe-Al based amorphous/nanocrystalline systems with enhanced Curie temperature and refrigeration capacity

Linlin Zhang, Mingdong Bao, Qiang Zheng, Linhai Tian, Juan Du

AIP Advances· Volume 6· Issue 3
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Source abstract

Abstract

The Gd-Fe-Al amorphous/nanocrystalline composites were successfully designed and obtained with both high Curie temperature (Tc) and large magnetic entropy change (ΔSM). The Tc can be tuned from 172 to 280 K and refrigeration capacity (RC) has a value between 690 and 867 J/kg under a field change of 0–5 T by changing the Gd contents and the formation of Gd nanocrystallites. And, ΔSM in Gd-Fe-Al amorphous/nanocrystalline composites reached a value of 7.2 J kg−1 K−1 under a field change of 0–5 T. The high RC in Gd-Fe-Al system were ascribed to the widening full width at half maximum (δFWHM) up to 240 K of the magnetic entropy change (ΔSMmax) peak because of the combination contribution of amorphous matrix and the precipitated Gd-riched nanocrystalline. Our research would shed light on how to design attractive candidates for magnetic refrigeration materials with high performance at near room temperature.
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Research context

NanomaterialsComposites

OpenAlex topics: Magnetic and transport properties of perovskites and related materials · Shape Memory Alloy Transformations · Thermal Expansion and Ionic Conductivity

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Taiyuan University of Technology 1 Research Institute of Surface Engineering, , Taiyuan City 030024, People’s Republic of China

Ningbo University of Technology 2 School of Materials Science and Chemical Engineering, , Ningbo, 315016, People’s Republic of China

Chinese Academy of Sciences 3 Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Material Technology and Engineering, , 1219 Zhongguan West Road, Ningbo 315201, People’s Republic of China

Funding

National Natural Science Foundation of China · Natural Science Foundation of Zhejiang Province · Natural Science Foundation of Ningbo

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