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Journal article · Preprint article

Coupled magnetic excitations in single crystal PrBa2Cu3O6.2

By Lister, S.J.S.; Boothroyd, A.T.; Andersen, N.H.1; Larsen, B.H.; Zhokhov, A.A.; Christensen, A.N.; Wildes, A.R.

From

Risø National Laboratory for Sustainable Energy, Technical University of Denmark1

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 model enables values for the principal exchange constants to be determined. The results 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 interlayer Cu-Cu exchange is significantly lower than in YBa2Cu3O6.2.

Language: English
Year: 2001
Pages: 5994-5997
ISSN: 00319007 and 10797114
Types: Journal article and Preprint article
DOI: 10.1103/PhysRevLett.86.5994
Keywords

Industrielle materialer

Other keywords

cond-mat.supr-con

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