The magnetic properties of naturally layered intermetallic compound SmMn2Si2 with textured structure have been studied. There exist a ferromagnetic transition at 35 K and two antiferromagnetic transitions at 120 and 230 K. The antiferromagnetic state below 230 K exhibits different magnetoresistance, with a negative magnetoresistance of 3%–4% for current I applied perpendicular to the c axis and with a positive magnetoresistance effect of about 4%–6% for current I parallel to the c axis. The observed magnetoresistance is likely to be related to magnetovolume effects. In the ferromagnetic state, a positive magnetoresistance with a maximum increase of 22% under an applied field of 5 T is observed at 4 K, and both H ' I and H i I configurations show positive magnetoresistance. © 1997 American Institute of Physics.
Zhao, M.; Sun, C.; Wang, L.; Su, Q.; Zhao, W.; and Tang, Jinke (1997). "Magnetic and magnetotransport properties of intermetallic SmMn 2 Si 2." JOURNAL OF APPLIED PHYSICS 81.8, 5534-5536.