Visualizing high-temperature spin dynamics in La1-xCaxMnO3 from a mapping of EPR linewidth and g factor

Y. Liu; S. L. Wan; X. G. Li

doi:10.1088/0953-8984/19/19/196213

Visualizing high-temperature spin dynamics in La1-xCaxMnO3 from a mapping of EPR linewidth and g factor

Strongly Correlated Electrons 2009-11-11 v2 Other Condensed Matter

Authors: Y. Liu , S. L. Wan , X. G. Li

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Abstract

This paper presents an analysis of electron paramagnetic resonance parameters, i.e., g factor, linewidth, and intensity on powder samples of La1-xCaxMnO3 at the commensurate carrier concentrations of x = N/8 (N = 1, 2, 3, 4, 5, 6, and 7). We demonstrate that the mapping of EPR parameters offers a powerful tool to investigate high-temperature spin dynamics in the phase diagram of colossal magnetoresistance (CMR) manganites. Our results convince that the spin-spin relaxation mechanism should dominate the high-temperature paramagnetic regime in CMR manganites.

Keywords

electron paramagnetic resonance spin dynamics colossal magnetoresistance manganite linewidth g factor

Cite

@article{arxiv.cond-mat/0603705,
  title  = {Visualizing high-temperature spin dynamics in La1-xCaxMnO3 from a mapping of EPR linewidth and g factor},
  author = {Y. Liu and S. L. Wan and X. G. Li},
  journal= {arXiv preprint arXiv:cond-mat/0603705},
  year   = {2009}
}

Comments

19 pages, 6 figures

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