MAGNETIC-ORDERING AND FLUCTUATIONS IN THE S = 1/2 SQUARE HEISENBERG-ANTIFERROMAGNET CU(DCO2)2.4D2O
Elastic and quasielastic neutron scattering measurements have been performed in the S=1/2 square Heisenberg antiferromagnet copper(II) deuteroformate tetradeuterate, Cu(DCO2)2.4D2O. The sublattice magnetization was measured below TN=16.54(5) K, and the critical exponent beta was found to cross over...
| Main Authors: | , , , , |
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| Format: | Journal article |
| Language: | English |
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1992
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| _version_ | 1826259419085668352 |
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| author | Clarke, S Harrison, A Mason, T Mcintyre, G Visser, D |
| author_facet | Clarke, S Harrison, A Mason, T Mcintyre, G Visser, D |
| author_sort | Clarke, S |
| collection | OXFORD |
| description | Elastic and quasielastic neutron scattering measurements have been performed in the S=1/2 square Heisenberg antiferromagnet copper(II) deuteroformate tetradeuterate, Cu(DCO2)2.4D2O. The sublattice magnetization was measured below TN=16.54(5) K, and the critical exponent beta was found to cross over from 0.23(1) to 0.32(2) at a reduced temperature epsilon =(TN-T)/TN of 0.06 as T N was approached from below. The temperature dependence of the inverse correlation length of the two-dimensional antiferromagnetic correlations and of the sublattice susceptibility above TN was consistent with the predictions of the quantum non-linear sigma model of Chakravarty (1989) and co-workers for a spin-wave stiffness of 13.4(4) K. |
| first_indexed | 2024-03-06T18:49:34Z |
| format | Journal article |
| id | oxford-uuid:0fbf9831-b8ff-4fc4-b09b-5c8c6d9df28b |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T18:49:34Z |
| publishDate | 1992 |
| record_format | dspace |
| spelling | oxford-uuid:0fbf9831-b8ff-4fc4-b09b-5c8c6d9df28b2022-03-26T09:52:50ZMAGNETIC-ORDERING AND FLUCTUATIONS IN THE S = 1/2 SQUARE HEISENBERG-ANTIFERROMAGNET CU(DCO2)2.4D2OJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:0fbf9831-b8ff-4fc4-b09b-5c8c6d9df28bEnglishSymplectic Elements at Oxford1992Clarke, SHarrison, AMason, TMcintyre, GVisser, DElastic and quasielastic neutron scattering measurements have been performed in the S=1/2 square Heisenberg antiferromagnet copper(II) deuteroformate tetradeuterate, Cu(DCO2)2.4D2O. The sublattice magnetization was measured below TN=16.54(5) K, and the critical exponent beta was found to cross over from 0.23(1) to 0.32(2) at a reduced temperature epsilon =(TN-T)/TN of 0.06 as T N was approached from below. The temperature dependence of the inverse correlation length of the two-dimensional antiferromagnetic correlations and of the sublattice susceptibility above TN was consistent with the predictions of the quantum non-linear sigma model of Chakravarty (1989) and co-workers for a spin-wave stiffness of 13.4(4) K. |
| spellingShingle | Clarke, S Harrison, A Mason, T Mcintyre, G Visser, D MAGNETIC-ORDERING AND FLUCTUATIONS IN THE S = 1/2 SQUARE HEISENBERG-ANTIFERROMAGNET CU(DCO2)2.4D2O |
| title | MAGNETIC-ORDERING AND FLUCTUATIONS IN THE S = 1/2 SQUARE HEISENBERG-ANTIFERROMAGNET CU(DCO2)2.4D2O |
| title_full | MAGNETIC-ORDERING AND FLUCTUATIONS IN THE S = 1/2 SQUARE HEISENBERG-ANTIFERROMAGNET CU(DCO2)2.4D2O |
| title_fullStr | MAGNETIC-ORDERING AND FLUCTUATIONS IN THE S = 1/2 SQUARE HEISENBERG-ANTIFERROMAGNET CU(DCO2)2.4D2O |
| title_full_unstemmed | MAGNETIC-ORDERING AND FLUCTUATIONS IN THE S = 1/2 SQUARE HEISENBERG-ANTIFERROMAGNET CU(DCO2)2.4D2O |
| title_short | MAGNETIC-ORDERING AND FLUCTUATIONS IN THE S = 1/2 SQUARE HEISENBERG-ANTIFERROMAGNET CU(DCO2)2.4D2O |
| title_sort | magnetic ordering and fluctuations in the s 1 2 square heisenberg antiferromagnet cu dco2 2 4d2o |
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