NMR study of quasi-1D magnetic chain in cuprates LiCu2O2 and NaCu2O2
Abstract
NMR investigation of magnetic structure and phase transitions in two isostructural quasi-one-dimensional cuprates LiCu2O2 and NaCu2O2 has been performed. While LiCu2O2 exhibits a magnetic phase transition at Tc = 24 K, NaCu2O2 orders magnetically at around 13 K. 6,7Li and 23Na NMR spectra in LiCu2O2 and NaCu2O2, respectively, provide an unambiguous experimental evidence that below Tc an incommensurate in-chain helical spin structure is established in both compounds. However, the features of the observed low temperature NMR are different pointing to different properties of the helical magnetic structure.
Supporting agencies: We appreciate support by the Grants RFBR 04-03-32876, MK-1212.2005.2.
About the Authors
A. A. Gippius
Moscow State University, Faculty of Physics; Institute of Crystallography RAS
Russian Federation
Russian Federation
Moscow 119992; Moscow 117333
E. N. Morozova
Moscow State University, Faculty of Physics; Institute of Crystallography RAS
Russian Federation
Russian Federation
Moscow 119992; Moscow 117333
K. S. Okhotnikov
Moscow State University, Faculty of Physics
Russian Federation
Russian Federation
Moscow 119992
A. S. Moskvin
Ural State University
Russian Federation
Russian Federation
Ekaterinburg 620083
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Review
For citations:
Gippius A.A., Morozova E.N., Okhotnikov K.S., Moskvin A.S. NMR study of quasi-1D magnetic chain in cuprates LiCu2O2 and NaCu2O2. Magnetic Resonance in Solids. 2006;8(1):28-32.
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