DataVXACS Applied Electronic MaterialsPaper
journal article·2024-06-25

Observation of an Extensive Curie Temperature Window and Synergic Multicaloric Effects in NiMnCuGaSn Alloys

Xinyu Zhang, Hanyang Qian, Rui Cai, Zhiyang Wei, Jing He, Mingxiao Zhang, Wen Sun, Jian Liu, Claudia Felser, Guowei Li

ACS Applied Electronic Materials· Volume 6· Issue 6
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Source abstract

Abstract

The study of multicaloric effects in Heusler alloys has attracted increasing research interest, fueled by their potential applications in solid-state refrigeration and energy conversion technologies. Despite the promising aspects, challenges such as the limited operating temperature range and large hysteresis have hindered the optimal device performance. Herein, by introducing a Cu/Sn co-substitution strategy, a Curie temperature window for synergic magnetostructural transformation is extended from 244 K to 313 K in the customized NiMnCuGaSn alloys, along with a substantial increase in transformation entropy change. Crucially, employing a combined approach of magnetic-field-stress loading and zero-field-stress unloading significantly reduces stress hysteresis and enhances the reversibility of the transformation, resulting in a significant adiabatic temperature change of 4.7 K at a relatively low critical stress. This approach underscores an efficient method to enhance caloric responses, paving the way for advances in cooling technologies.
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Research context

Metals & alloys

OpenAlex topics: Shape Memory Alloy Transformations · Magnetic and transport properties of perovskites and related materials · Intermetallics and Advanced Alloy Properties

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

Affiliations

School of Materials Science & Chemical Engineering, Ningbo University, Ningbo 315211, China

CAS Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China

University of Chinese Academy of Sciences, Beijing 100049, China

Dongguan Key Laboratory of Interdisciplinary Science for Advanced Materials and Large-Scale Scientific Facilities, College of Physical Science, Great Bay University, Dongguan 523000, China

School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China

Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Strasse 40, 01187, Dresden, Germany

Funding

Natural Science Foundation of Ningbo Municipality · National Key Research and Development Program of China · Max-Planck-Gesellschaft · National Natural Science Foundation of China · Chinese Academy of Sciences · Natural Science Foundation of Zhejiang Province · Ningbo Yongjiang Talent Introduction Programme

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