Antiferromagnet (Ln,Ca)CuO2.5 near the quantum critical point (Ln = Pr,Nd)

K. Kakuta, K. Ohishi, S. Furuya, W. Higemoto, R. Kadono, Jun Akimitsu

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Abstract

The Neel temperatures TN of two-leg ladder compounds LnCuO2.5 (Ln: Pr, Nd) kin to LaCuO2.5 were determined by zero-field muon spin precession. It was found that TN = 17 K in PrCuO2.5 and 1.8 K in NdCuO2.5, which are both considerably reduced from TN = 125 K in LaCuO2.5. No spin precession signal was observed in Nd0.65Ca0.35CuO2.5. These results demonstrate that the spin-ladder system approaches the quantum critical point by substituting Pr or Nd for La, and that the Neel order of these compounds is completely destroyed upon Ca doping.

Original languageEnglish
Pages (from-to)168-171
Number of pages4
JournalPhysica B: Condensed Matter
Volume289-290
DOIs
Publication statusPublished - Aug 2000
Externally publishedYes

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ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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