Phase separation and enhanced charge-spin coupling near magnetic transitions

Francisco Guinea, Guillermo Gómez-Santos, Daniel P. Arovas
2000 Physical Review B (Condensed Matter)  
The generic changes of the electronic compressibility in systems which show magnetic instabilities is studied. It is shown that, when going into the ordered phase, the compressibility is reduced by an amount comparable to the its original value, making charge instabilities also possible. We discuss, within this framework, the tendency towards phase separation of the double exchange systems, the pyrochlores, and other magnetic materials.
doi:10.1103/physrevb.62.391 fatcat:f2qjrramojbhvnrs2uohxcsfqq