ESR study of (Sr,La,Ca)_{14}Cu_{24}O_{41}

V. Kataev; K. -Y. Choi; M. Grueninger; U. Ammerahl; B. Buechner; A. Freimuth; A. Revcolevschi

doi:10.1016/S0921-4526(01)01288-1

ESR study of (Sr,La,Ca)_{14}Cu_{24}O_{41}

Strongly Correlated Electrons 2009-11-07 v1

Authors: V. Kataev , K. -Y. Choi , M. Grueninger , U. Ammerahl , B. Buechner , A. Freimuth , A. Revcolevschi

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Abstract

We report an electron spin resonance (ESR) study of single crystals of the spin-chain spin-ladder compound (Sr,La,Ca)_{14}Cu_{24}O_{41}. The data suggest that in intrinsically hole doped Sr_{14-x}Ca_xCu_{24}O_{41} only a small amount of holes is transferred from the chains to the ladders with increasing x, resulting in a crossover from spin dimerized to uniform spin chains. In the samples of La_{14-x}Ca_xCu_{24}O_{41} with reduced hole content a very broad signal is observed in the paramagnetic state, indicative of a surprisingly strong anisotropy of the nearest neighbor exchange in the chains.

Keywords

electron spin resonance spin chain spin ladder Sr_14Cu_24O_41 anisotropy hole doping

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@article{arxiv.cond-mat/0108512,
  title  = {ESR study of (Sr,La,Ca)_{14}Cu_{24}O_{41}},
  author = {V. Kataev and K. -Y. Choi and M. Grueninger and U. Ammerahl and B. Buechner and A. Freimuth and A. Revcolevschi},
  journal= {arXiv preprint arXiv:cond-mat/0108512},
  year   = {2009}
}

Comments

3 pages, 2 figures, to be published in Physica B (Proceedings of SCES2001, Ann Arbor, MI, USA, August 6-10, 2001)

ESR study of (Sr,La,Ca)_{14}Cu_{24}O_{41}

Abstract

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