Paramagnetic Spin Correlations in Colossal Magnetoresistive La0.7Ca0.3MnO3

Joel S. Helton; Matthew B. Stone; Dmitry A. Shulyatev; Yakov M. Mukovskii; Jeffrey W. Lynn

doi:10.1103/PhysRevB.85.144401

Paramagnetic Spin Correlations in Colossal Magnetoresistive La0.7Ca0.3MnO3

Strongly Correlated Electrons 2012-04-04 v2

Authors: Joel S. Helton , Matthew B. Stone , Dmitry A. Shulyatev , Yakov M. Mukovskii , Jeffrey W. Lynn

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Abstract

Neutron spectroscopy measurements reveal dynamic spin correlations throughout the Brillouin zone in the colossal magnetoresistive material La0.7Ca0.3MnO3 at 265 K (approximately 1.03 Tc). The long-wavelength behavior is consistent with spin diffusion, yet an additional and unexpected component of the scattering is also observed in low-energy constant-E measurements, which takes the form of ridges of strong quasielastic scattering running along (H 0 0) and equivalent directions. Well-defined Q-space correlations are observed in constant-E scans at energies up to at least 28 meV, suggesting robust short-range spin correlations in the paramagnetic phase.

Keywords

chargino decays neutralinos complex MSSM one-loop calculation LSP branching ratios supersymmetry

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@article{arxiv.1202.0487,
  title  = {Paramagnetic Spin Correlations in Colossal Magnetoresistive La0.7Ca0.3MnO3},
  author = {Joel S. Helton and Matthew B. Stone and Dmitry A. Shulyatev and Yakov M. Mukovskii and Jeffrey W. Lynn},
  journal= {arXiv preprint arXiv:1202.0487},
  year   = {2012}
}

Comments

v2: 5 pages, 5 figures. Figure added and text edited to match published version. v1: 5 pages, 4 figures

Paramagnetic Spin Correlations in Colossal Magnetoresistive La0.7Ca0.3MnO3

Abstract

Keywords

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