TY - JOUR
T1 - Large, low-field and reversible magnetostrictive effect in MnCoSi-based metamagnet at room temperature
AU - Liu, Jun
AU - Gong, Yuanyuan
AU - Zhang, Fengqi
AU - You, Yurong
AU - Xu, Guizhou
AU - Miao, Xuefei
AU - Xu, Feng
PY - 2021
Y1 - 2021
N2 - TiNiSi-type MnCoSi-based alloys show large magnetostriction during the magnetic-field-induced metamagnetic transition. However, the high critical field required to drive the transition directly hinders their potential applications. In this work, we systematically investigate the tricritical behavior and magnetostrictive effect in substituted MnCoSi alloys. Replacing Si with Sb or In, Co with Fe or Cu, and Mn with Co, which can simultaneously reduce the critical field and the temperature of tricritical point, are explored. Among the substituted MnCoSi alloys, Mn0.983Co1.017Si displays a temperature of a tricritical point of 250 K and a room-temperature critical field of 0.60 T, which is the lowest up to now. Profited from these optimizations, a large reversible magnetostrictive effect under low field is successfully realized at room temperature. In a field of 1 T, the magnetostriction of Mn0.983Co1.017Si alloy is close to 1000 ppm. Besides, a strong relation between critical field and valence electron concentration is revealed in the transition-metal-substituted MnCoSi alloys. Our work greatly enhances the low-field magnetostrictive performance of MnCoSi-based alloys and make them be of interest in potential applications.
AB - TiNiSi-type MnCoSi-based alloys show large magnetostriction during the magnetic-field-induced metamagnetic transition. However, the high critical field required to drive the transition directly hinders their potential applications. In this work, we systematically investigate the tricritical behavior and magnetostrictive effect in substituted MnCoSi alloys. Replacing Si with Sb or In, Co with Fe or Cu, and Mn with Co, which can simultaneously reduce the critical field and the temperature of tricritical point, are explored. Among the substituted MnCoSi alloys, Mn0.983Co1.017Si displays a temperature of a tricritical point of 250 K and a room-temperature critical field of 0.60 T, which is the lowest up to now. Profited from these optimizations, a large reversible magnetostrictive effect under low field is successfully realized at room temperature. In a field of 1 T, the magnetostriction of Mn0.983Co1.017Si alloy is close to 1000 ppm. Besides, a strong relation between critical field and valence electron concentration is revealed in the transition-metal-substituted MnCoSi alloys. Our work greatly enhances the low-field magnetostrictive performance of MnCoSi-based alloys and make them be of interest in potential applications.
KW - Magnetoelastic transition
KW - Magnetostrictive effect
KW - MnCoSi alloy
KW - Reversibility
KW - Tricritical point
UR - http://www.scopus.com/inward/record.url?scp=85096611753&partnerID=8YFLogxK
U2 - 10.1016/j.jmst.2020.11.011
DO - 10.1016/j.jmst.2020.11.011
M3 - Article
AN - SCOPUS:85096611753
SN - 1005-0302
VL - 76
SP - 104
EP - 110
JO - Journal of Materials Science and Technology
JF - Journal of Materials Science and Technology
ER -