Abstract
Magnetization, magnetic susceptibility and electrical resistivity measurements have been carried out for Nd7Pd3 single crystals having the Fe7Th3-type hexagonal structure with the space group P63mc. Nd7Pd3 possesses an antiferromagnetic (AF) state at temperatures below TN = 39 K and a ferromagnetic or ferrimagnetic one at temperatures below TC = 34 K. Another magnetic transition or a magnetic structure change was found at Tt = 15.7 K. In the ferromagnetic state, Nd7Pd3 has a relatively large magnetic anisotropy; the easy magnetization direction is the a-axis, and hard one is the c-axis. Metamagnetic transitions were observed in the AF state along the c-axis and in the c-plane; the critical field HC increases with increasing temperature. The magnetization curve has an inflection point even in the paramagnetic state at 45 K in the c-plane, indicating a field-induced transition in the region having antiferromagnetic short-range order.
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