Large relative cooling power arising from consecutive magnetic phase transitions in van der Waals CrSBr
Abstract
Two-dimensional (2D) van der Waals magnets are promising for low-dimensional solid-state refrigeration, but their relative cooling power (RCP) is often limited by modest magnetic entropy changes. Here, we show that CrSBr single crystals undergo successive three-step magnetic transitions, which broaden the working temperature window as magnetic refrigerant. This multistep behavior, combined with in-plane anisotropy along the b axis, yields a maximum magnetic entropy change of 4.9 J kg−1 K−1 under 7 T and a large RCP of 273.68 J kg−1 at 5 T, surpassing most reported 2D magnets. Critical scaling analysis reveals tricritical mean-field behavior near the intralayer ferromagnetic–paramagnetic transition. These results demonstrate that multistep transitions provide an effective route to enhance refrigeration efficiency, establishing CrSBr as a high-performance 2D magnetic refrigerant.
Article Details
Journal Info
Applied Physics Letters
American Institute of Physics
Authors (9)
Haifeng Chen
Cuicui Hu
Jiangsu Laboratory of Advanced Functional Materials, School of Physics and Electronic Engineering, Suzhou University of Technology 1 , Changshu 215500,
Zilu Xia
Jiangsu Laboratory of Advanced Functional Materials, School of Physics and Electronic Engineering, Suzhou University of Technology 1 , Changshu 215500,
Lina Jiang
Haicheng Xuan
College of Materials Science and Engineering, Taiyuan University of Technology 1 , Taiyuan 030024,
Yong Fang
Bin Qian
Jinlei Yao
Key Laboratory of Efficient Low-Carbon Energy Conversion and Utilization of Jiangsu Provincial Higher Education Institutions, School of Physical Science and Technology, Suzhou University of Science and Technology 2 , Suzhou 215009,
Zhida Han
School of Electronic and Information Engineering, Suzhou University of Technology 1 , Changshu 215500,