Abstract
Magnetic transitions and magnetoresistance of the HfFe6Ge6-type Y0.5Ho0.5Mn6Sn6 compound have been investigated in the temperature range of 5–380 K. It was found that the compound displays paramagnetism, ferrimagnetism, antiferromagnetism, and reentrant ferrimagnetism with decreasing temperature. The temperature range of the antiferromagnetic state can be narrowed by increasing the magnetic field, and the metamagnetic transition from the antiferro- to ferrimagnetic state can be induced by a fairly small threshold field (<6 kOe). The antiferro-ferrimagnetic transition is accompanied by a large magnetoresistance effect of about −16% at 100 K. The magnetic transitions with temperature and magnetic field are both of the second order.
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