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Magnetic analog of the isotope effect in cuprates

Rinat Ofer, Galina Bazalitsky, Amit Kanigel, Amit Keren, Assa Auerbach, James S. Lord, and Alex Amato
Phys. Rev. B 74, 220508(R) – Published 13 December 2006

Abstract

We present extensive magnetic measurements of the (CaxLa1x)(Ba1.75xLa0.25+x)Cu3Oy system with its four different families (x) having a Tcmax(x) variation of 28% and minimal structural changes. For each family, we measured the Néel temperature, the anisotropies of the magnetic interactions, and the spin-glass temperature. Our results exhibit a universal relation Tc=cJns for all families, where c1, J is the in-plane Heisenberg exchange, and ns is the superconducting carrier density. This relates cuprate superconductivity to magnetism in the same sense that phonon-mediated superconductivity is related to atomic mass.

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  • Received 30 October 2006

DOI:https://doi.org/10.1103/PhysRevB.74.220508

©2006 American Physical Society

Authors & Affiliations

Rinat Ofer1, Galina Bazalitsky1, Amit Kanigel1, Amit Keren1, Assa Auerbach1, James S. Lord2, and Alex Amato3

  • 1Physics Department, Technion-Israel Institute of Technology, Haifa 32000, Israel
  • 2Rutherford Appleton Laboratory, Chilton Didcot, Oxfordshire OX11 0QX, United Kingdom
  • 3Paul Scherrer Institute, CH 5232 Villigen PSI, Switzerland

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Issue

Vol. 74, Iss. 22 — 1 December 2006

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