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

doi:10.1103/PhysRevLett.86.5994

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

Research output: Contribution to journal › Journal article › Research › peer-review

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 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.

Original language	English
Journal	Physical Review Letters
Volume	86
Issue number	26
Pages (from-to)	5994-5997
ISSN	0031-9007
DOIs	https://doi.org/10.1103/PhysRevLett.86.5994
Publication status	Published - 2001

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@article{89702b8ef6b84b3c9f773fa4e2f88ed3,

title = "Coupled magnetic excitations in single crystal PrBa2Cu3O6.2",

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 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. ",

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author = "S.J.S. Lister and A.T. Boothroyd and N.H. Andersen and B.H. Larsen and A.A. Zhokhov and A.N. Christensen and A.R. Wildes",

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T1 - Coupled magnetic excitations in single crystal PrBa2Cu3O6.2

AU - Lister, S.J.S.

AU - Boothroyd, A.T.

AU - Andersen, N.H.

AU - Larsen, B.H.

AU - Zhokhov, A.A.

AU - Christensen, A.N.

AU - Wildes, A.R.

PY - 2001

Y1 - 2001

N2 - 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.

AB - 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.

KW - Industrielle materialer

U2 - 10.1103/PhysRevLett.86.5994

DO - 10.1103/PhysRevLett.86.5994

M3 - Journal article

VL - 86

SP - 5994

EP - 5997

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 26