Enhanced magnetocaloric effects in hetero-structural alloyed Er2In1-xAlx (0 ≤ x ≤ 0.4) system by novel nonhysteretic metamagnetsm

• Published in: Scripta materialia Vol. 194; p. 113649
• Main Authors: Yao, Guiquan, Sun, Shengyu, Yang, Jiancheng, Wu, Haofa, Wang, Qiang, Zhu, Jie, Cui, Weibin
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 15.03.2021
• Subjects: Magnetic entropy change; Magnetostriction; Metamagnetic phase transition; Nonhysteresis; Magnetic entropy change; Nonhysteresis; Magnetostriction; Metamagnetic phase transition
• ISSN: 1359-6462; 1872-8456
• DOI: 10.1016/j.scriptamat.2020.113649

By hetero-structural alloying antiferromagnetic orthorhombic Er2Al and ferromagnetic hexagonal Er2In which both undergo the second-order phase transition, an unconventional nonhysteretic metamagnetic phase transition is observed at the critical composition of x = 0.2 in Er2In1-xAlx (0 ≤ x ≤ 0.4) system. The magnetic entropy change and adiabatic temperature change is enhanced to 16.9 Jkg−1K−1 and 7.2 K in Er2In0.8Al0.2 with the largest saturation magnetostriction of -1117 ppm under 7 T. By correlating with specific heat and magnetotransport measurement, the origin of such unique nonhysteretic metamagnetism is assumed to be from the field-induced reconstruction of 5d subband of rare-earth elements. [Display omitted]