Magnetism and Transport Properties of HfFe₆Ge₆-type Er_1-xGd_xMn₆Ge₆（x=0.2-0.9） Compounds

汪汝武^1,2,3，刘静³

1. The Hubei Province Key Laboratory of Refractories and Ceramics Ministry-Province jointly-Constructed Cultivation Base for State Key Laboratory2. Hubei Province Key Laboratory of Systems Science in Metallurgical Process3. College of Materials Science and Metallurgical Engineering,Wuhan University of Science and Technology

摘 要：Magnetic transitions and magnetotransport properties of polycrystalline Er1-xGdxMn6Ge6（x=0.2-0.9） compounds were studied.The magnetic and resistivity properties were analyzed in an applied magnetic field up to 5 T.It is found that Er1-xGdxMn6Ge6（x=0.2-0.9） compounds displays a transition from the antiferromagnetic state to the ferrimagnetic state for increasing Gd content.The Er1-xGdx Mn6Ge6 with x=0.2 and 0.5 compounds order antiferromagnetically at 430 and 432 K,respectively.The Er1-x GdxMn6Ge6 with x=0.8 and 0.9 compounds order ferrimagnetically at 462 and 471 K,respectively.The Er1-xGdxMn6Ge6 compounds undergo the second transitions below 71 K.The magnetoresistance curves of the Er0.1Gd0.9Mn6Ge6 compound in a field of 5 T are presented and the magnetoresistance effects are related to the metamagnetic transitions.

关键词：