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Structural, transport, and magnetic properties of Nd 1Ϫx Ca x MnO 3 (0рxр1) have been studied to probe the consequence of strong lattice distortion and reduced double exchange. Charge ordering has been observed over a large composition range of 0.30рxр0.80. For 0.33рxр0.40, at low temperatures, a magnetic field induces a first-order antiferromagnetic semiconductor to ferromagnetic metal transition and reduces the resistance by several orders of magnitude. These results illustrate the competition between double exchange and mechanisms that promote charge localization.

Rapid cooling and magnetic field-induced cooperative effect for the metastable quintet state in a spin crossover complex Permalink https://escholarship.org/uc/item/7fb4k5pr JournalApplied Physics Letters, 74(26)

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