Magnetic-field-induced collapse of charge-ordered nanoclusters and the Colossal Magnetoresistance effect in Nd(0.3)Sr(0.3)MnO(3)

Abstract

We report synchrotron x-ray scattering studies of charge/orbitally ordered (COO) nanoclusters in Nd${}_{0.7}$Sr${}_{0.3}$MnO${}_3$. We find that the COO nanoclusters are strongly suppressed in an applied magnetic field, and that their decreasing concentration follows the field-induced decrease of the sample electrical resistivity. The COO nanoclusters, however, do not completely disappear in the conducting state, suggesting that this state is inhomogeneous and contains an admixture of an insulating phase. Similar results were also obtained for the zero-field insulator-metal transition that occurs as temperature is reduced. These observations suggest that these correlated lattice distortions play a key role in the Colossal Magnetoresistance effect in this prototypical manganite.

arXiv comment5 pages, 3 embedded eps figures; to appear in PRB Rapid Commumications

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Cited by in corpus (7)

• Complex ferromagnetic state and magnetocaloric effect in single crystalline Nd_{0.7}Sr_{0.3}MnO_{3}
• Spin Rotation Technique for Non-Collinear Magnetic Systems: Application to the Generalized Villain Model
• Average Lattice Symmetry and Nanoscale Structural Correlations in Magnetoresistive Manganites
• Chemical potential shift induced by double-exchange and polaronic effects in Nd_{1-x}Sr_xMnO_3
• Nanoclustering phase competition induces the resistivity hump in colossal magnetoresistive manganites
• Spin Dynamics of Double-Exchange Manganites with Magnetic Frustration
• Double Exchange in a Magnetically Frustrated System