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American Physical Society, Physical Review Letters, 24(83), p. 5142-5145

DOI: 10.1103/physrevlett.83.5142

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Giant Oxygen Isotope Effect on the Spin Glass Transition inLa2−xSrxCu1−zMnzO4as Revealed by Muon Spin Rotation

Journal article published in 1999 by A. Shengelaya, Guo-Meng Zhao, C. M. Aegerter ORCID, K. Conder, I. M. Savić, H. Keller
This paper was not found in any repository, but could be made available legally by the author.
This paper was not found in any repository, but could be made available legally by the author.

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Abstract

We have observed a huge oxygen isotope effect on the spin glass transition in La2-xSrxCu1-zMnzO4 ( x = 0.03 and 0.05, z = 0.02) using the muon-spin-rotation technique. Upon replacing 16O with 18O, the spin glass freezing temperature Tg in the Mn-doped samples increases by about 80% for x = 0.03 and 30% for x = 0.05. On the other hand, Tg has a small isotope shift in the Mn-free samples. These novel isotope effects clearly demonstrate a strong effect of electron-phonon interaction on magnetism which can be explained taking into account the polaronic nature of charge carriers in cuprates.