A precise measurement of the oxygen isotope effect on the néel temperature in cuprates

E. Amit, Amit Keren, J. S. Lord, P. King

Research output: Contribution to journalArticlepeer-review

Abstract

A limiting factor in the ability to interpret isotope effect measurements in cuprates is the absence of sufficiently accurate data for the whole phase diagram; there is precise data for T c, but not for the antiferromagnetic transition temperature T N. Extreme sensitivity of T N to small changes in the amount of oxygen in the sample is the major problem. This problem is solved here by using the novel compound (Ca0.1La0.9)(Ba 1.65La0.35) Cu3 Oyfor which there is a region where T N is independent of oxygen doping. Meticulous measurements of T N for samples with 16Oand 18Ofind the absence of an oxygen isotope effect on T N with unprecedented accuracy. A possible interpretation of our finding and existing data is that isotope substitution affects the normal state charge carrier density.

Original languageEnglish
Article number178190
JournalAdvances in Condensed Matter Physics
Volume2011
DOIs
StatePublished - 2011

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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