Magnetization of hole-doped CuO2 spin chains in Sr14xCaxCu24O41

R. Klingeler, N. Tristan, B. Büchner, M. Hücker, U. Ammerahl, and A. Revcolevschi
Phys. Rev. B 72, 184406 – Published 4 November 2005

Abstract

We report on magnetization measurements of Sr14xCaxCu24O41, with 0x12, in magnetic fields up to 16T. The low-temperature magnetic response of the CuO2 spin chains changes strongly upon doping. For x=0, the ground state with nearly independent dimers is confirmed. A reduction of the number of holes in the chains through Ca doping leads to an additional contribution to the magnetization, which depends linearly on the magnetic field. Remarkably, the slope of this linear contribution increases with the Ca content. We argue that antiferromagnetic spin chains do not account for this behavior but that the hole dynamics might be involved.

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  • Received 4 May 2005

DOI:https://doi.org/10.1103/PhysRevB.72.184406

©2005 American Physical Society

Authors & Affiliations

R. Klingeler1,2,*, N. Tristan2, B. Büchner2, M. Hücker3,4, U. Ammerahl3, and A. Revcolevschi3

  • 1Laboratoire National des Champs Magnétiques Pulsés, 31432 Toulouse, France
  • 2Leibniz-Institute for Solid State and Materials Research IFW Dresden, 01171 Dresden, Germany
  • 3Laboratoire de Physico-Chimie des Solides, Université Paris-Sud, 91405 Orsay Cédex, France
  • 4Department of Physics, Brookhaven National Laboratory, Upton, New York 11973, USA

  • *Electronic address: r.klingeler@ifw-dresden.de

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Issue

Vol. 72, Iss. 18 — 1 November 2005

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