First-order non-hysteretic phase transition: a pathway to enhanced magnetocaloric and giant magnetoresistance effects in a Gd-Al alloy.

• Tác giả: Weibin Cui, Peng Gao, Zonghang Liu, Guangzhao Wang, Guiquan Yao, Che Zhang
• Ngôn ngữ: eng
• Ký hiệu phân loại: 006.331 *Knowledge acquisition
• Thông tin xuất bản: England : Physical chemistry chemical physics : PCCP , 2025
• Bộ sưu tập: NCBI
• ID: 10266

Tóm tắt

Fascinating physical phenomena often occur near the phase transition points in materials. This study provides a comprehensive investigation into the structural and magnetic properties of a Gd-Al alloy using both experimental and theoretical methods. The results indicate that the Gd-Al alloy exhibits a distinct antiferromagnetic phase transition under a low magnetic field. Theoretical calculations show a non-collinear alignment of magnetic moments on a crystal plane parallel to (001). A non-hysteretic metamagnetic transition, which suggests a magnetoelastic transition with discontinuous volume changes, is observed when the external magnetic field increases. The alloy demonstrates a significant magnetic entropy change of 16.5 J kg