Magnetization and magnetoresistance studies of HfFe6Ge6-type Y1−xLaxMn6Sn6 (x = 0.1 and 0.2) compounds

• Published in: Journal of physics. D, Applied physics Applied physics, 2004-04, Vol.37 (7), p.983-987
• Main Authors: Yao, Jin-lei, Zhang, Shao-ying, Liu, Bao-dan, Yan, Mi, Wang, Ru-wu, Zhang, Li-gang, Shen, Bao-gen
• Format: Article
• Language: English
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Exact sciences and technology; Giant magnetoresistance; Magnetic properties and materials; Magnetotransport phenomena, materials for magnetotransport; Physics; Spin arrangements in magnetically ordered materials (including neutron and spin-polarized electron studies, synchrotron-source x-ray scattering, etc.)
• ISSN: 0022-3727; 1361-6463
• DOI: 10.1088/0022-3727/37/7/004

Magnetic transitions and the magnetoresistance effect of the HfFe6Ge6-type Y1-xLaxMn6Sn6 (x = 0.1 and 0.2) compounds have been investigated in the temperature range 5-385 K. The samples display an antiferromagnetic behaviour in the whole magnetic ordering temperature range, and their Neel temperature is 309 K and 323 K for x = 0.1 and 0.2, respectively. The metamagnetic transition from antiferromagnetism to ferromagnetism can be induced by an applied field. The metamagnetic transition field varies from 20 kOe at 5 K to 4 kOe at 300 K. The giant magnetoresistance effect is observed with the metamagnetic behaviour, such as -10.4% at 245 K for x = 0.1 under 50 kOe. Interestingly, the positive magnetoresistance for x = 0.2 appears below 110 K.