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Coupled Magnetic Excitations in Single Crystal PrBa2Cu3O6.2 | | S.J.S. Lister
; A.T. Boothroyd
; N. H. Andersen
; B. H. Larsen
; A. A. Zhokhov
; A. N. Christensen
; A. R. Wildes
; | | Date: |
15 May 2001 | | Subject: | Superconductivity | cond-mat.supr-con | | Abstract: | The dispersion of the low-energy magnetic excitations of the Pr sublattice in PrBa2Cu3O6.2 is determined by inelastic neutron scattering measurements on a single crystal. The dispersion, which shows the effect of interactions with the Cu spin-waves, is well described by a model of the coupled Cu-Pr magnetic system. This enables values for the principal exchange constants to be determined, which suggest that both Pr-Pr and Cu-Pr interactions are important in producing the anomalously high ordering temperature of the Pr sublattice. Measurements of the Cu optic spin wave mode show that the inter-layer Cu-Cu exchange is significantly lower than in YBa2Cu3O6.2. | | Source: | arXiv, cond-mat/0105292 | | Services: | Forum | Review | PDF | Favorites | |
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