Colossal magnetoresistance and charge order in La1−xCaxMnO3 (invited)

Double-exchange ferromagnets with their associated large magnetoresistance have recently been considered as candidates in magnetic storage applications. We review materials aspects of one compound family, ${\mathrm{La}}_{\text{1−x}}{\mathrm{Ca}}_x{\mathrm{MnO}}_3$ . There exist two distinct low temperature regimes; (i) ferromagnetic and metallic $\text{(x<0.5)}$ and (ii) charge-ordered and semiconducting $\text{(x>0.5)}$ . We describe transport, magnetic, thermal and acoustic response in each regime.