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Colossal Magnetoresistance in Mn2+ Oxypnictides NdMnAsO1–xFx

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journal contribution
posted on 30.05.2012, 00:00 by Eve J. Wildman, Janet M. S. Skakle, Nicolas Emery, Abbie C. Mclaughlin
Colossal magnetoresistance is a rare phenomenon in which the electronic resistivity of a material can be decreased by orders of magnitude upon application of a magnetic field. Such an effect could be the basis of the next generation of memory devices. Here we report CMR in the antiferromagnetic oxypnictide NdMnAsO1–xFx as a result of competition between an antiferromagnetic insulating phase and a paramagnetic semiconductor upon application of a magnetic field. Mn2+ oxypnictides are relatively unexplored, and tailored synthesis of novel compounds could result in an array of materials for further investigation and optimization.