Magnetic and magnetotransport properties of intermetallic SmMn2Si2
journal contributionposted on 15.04.1997, 00:00 by M. Zhao, C. Sun, L. Wang, Q. Su, W. Zhao, Jinke Tang
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 ǁ I configurations show positive magnetoresistance.