@article{oai:nagoya.repo.nii.ac.jp:00005508, author = {Ikoma, Daisaku and Tsuchiura, Hiroki and Inoue, Jun-ichiro}, issue = {1}, journal = {Physical Review B}, month = {Jul}, note = {The magnetic phase diagram of metallic kagomeĀ“ and pyrochlore lattices at the ground state have been studied theoretically in the double-exchange model using a mean-field approximation. The model includes the hopping of itinerant electrons, which is expressed by a single tight-binding band, antiferromagnetic coupling between localized spins, and ferromagnetic exchange interaction between the localized and itinerant electron spins. The phase diagram was found to be rather insensitive to the ferromagnetic exchange interaction but to show a rich variety in magnetic structure with doping. A crossover between ferromagnetic and spin glass phases observed in RE_2Mo_2O_7 pyrochlore lattices, where RE denotes rare-earth ions, is discussed in view of the calculated results.}, pages = {014420--014420}, title = {Magnetic phase diagram of metallic pyrochlore lattice in the double-exchange model}, volume = {68}, year = {2003} }