Magnetic structure of Nd2Mo2O7

Neutron diffraction studies have been carried out on a single crystal of th e metallic pyrochlore ferromagnet Nd2Mo2O7. The magnetic structures propose d at 4K is non-collinear for both the Mo- and Nd-moments, where the net mom ents of the two systems align antiparallel. In the temperature region betwe en the Curie point (similar to 93 K) and similar to 30 K, the moments prima rily at Mo sites orders with the ferromagnetic magnetization, where the str ucture seems to be non-collinear, too. The ordering of the Nd moments gradu ally develops and becomes significant below similar to 20 K with decreasing temperature. Discussion on the relationship between the magnetic structure and the anomalous transport properties is presented.