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Critical spin dynamics in the antiferromagnet La4Ni3O8 from 139La nuclear magnetic resonance.
- Source :
-
Physical Review B: Condensed Matter & Materials Physics . Jan2011, Vol. 83 Issue 1, p14402:1-14402:4. 4p. - Publication Year :
- 2011
-
Abstract
- We report 139La nuclear magnetic resonance data in La4Ni3O8 that reveal the presence of antiferromagnetic order below TN~105 K. This remarkable compound contains two-dimensional (2D) layers of NiO2 with unusual Ni valences. La4Ni3O8, with antiferromagnetic order of S=1/2 Ni1+ spins, is analogous to the parent compounds of the cuprate superconductors. Our data clearly reveal dramatic spectral changes and low-energy antiferromagnetic correlations associated with the onset of long-range order below TN. These critical spin fluctuations, however, do not diverge at the second-order phase transition but rather appear to be associated with a T=0 transition characteristic of 2D spin fluctuations. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 10980121
- Volume :
- 83
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Physical Review B: Condensed Matter & Materials Physics
- Publication Type :
- Academic Journal
- Accession number :
- 66718410
- Full Text :
- https://doi.org/10.1103/PhysRevB.83.014402