title: Colossal magnetoresistance in Mn2+ oxypnictides NdMnAsO(1-x)F(x).
abstract: 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 NdMnAsO(1-x)F(x) as a result of competition between an antiferromagnetic insulating phase and a paramagnetic semiconductor upon application of a magnetic field. Mn(2+) oxypnictides are relatively unexplored, and tailored synthesis of novel compounds could result in an array of materials for further investigation and optimization.
authors.affiliation: Department of Chemistry, University of Aberdeen, Meston Walk, Aberdeen AB24 3UE, UK.
authors.forename: Eve J
authors.initials: EJ
authors.lastname: Wildman
authors.forename: Janet M S
authors.initials: JM
authors.lastname: Skakle
authors.forename: Nicolas
authors.initials: N
authors.lastname: Emery
authors.forename: Abbie C
authors.initials: AC
authors.lastname: McLaughlin