Magnetic order in lightly doped La_{2-x}Sr_{x}CuO_{4}

A. Gozar; B. S. Dennis; G. Blumberg; Seiki Komiya; Yoichi Ando

doi:10.1103/PhysRevLett.93.027001

Magnetic order in lightly doped La_{2-x}Sr_{x}CuO_{4}

Strongly Correlated Electrons 2009-11-10 v1

Authors: A. Gozar , B. S. Dennis , G. Blumberg , Seiki Komiya , Yoichi Ando

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Abstract

We study long wavelength magnetic excitations in lightly doped La_{2-x}Sr_{x}CuO_{4} (x < 0.03) detwinned crystals. The lowest energy magnetic anisotropy induced gap can be understood in terms of the antisymmetric spin interaction inside the antiferromagnetic (AF) phase. The second magnetic resonace, analyzed in terms of in-plane spin anisotropy, shows unconventional behavior within the AF state and led to the discovery of collective spin excitations pertaining to a field induced magnetically ordered state. This state persists in a 9 T field to more than 100 K above the N\'{e}el temperature in x = 0.01.

Keywords

La$_{2-x}$Sr$_x$CuO$_4$ magnetic order spin anisotropy collective spin excitations antiferromagnetic phase

Cite

@article{arxiv.cond-mat/0407248,
  title  = {Magnetic order in lightly doped La_{2-x}Sr_{x}CuO_{4}},
  author = {A. Gozar and B. S. Dennis and G. Blumberg and Seiki Komiya and Yoichi Ando},
  journal= {arXiv preprint arXiv:cond-mat/0407248},
  year   = {2009}
}

Comments

5 pages, 5 figures

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