{"created":"2021-03-01T06:05:57.728245+00:00","id":2262,"links":{},"metadata":{"_buckets":{"deposit":"a0027440-6599-4217-bcdc-249f896194d6"},"_deposit":{"id":"2262","owners":[],"pid":{"revision_id":0,"type":"depid","value":"2262"},"status":"published"},"_oai":{"id":"oai:niigata-u.repo.nii.ac.jp:00002262","sets":["154:501:502","453:454"]},"item_5_biblio_info_6":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2011-01","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"014404","bibliographicPageEnd":"5","bibliographicPageStart":"1","bibliographicVolumeNumber":"83","bibliographic_titles":[{"bibliographic_title":"Physical Review B"},{"bibliographic_title":"Physical Review B","bibliographic_titleLang":"en"}]}]},"item_5_description_4":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"We develop a general theory of the spin dynamics of Heisenberg antiferromagnetic rings (HAFRs) that explains the mechanism of NMR spin-lattice relaxation at low temperatures. In HAFRs, the imaginary parts of the q-summed dynamic spin susceptibilities parallel and perpendicular to an applied static field, χ′′sum∥(ω) and χ′′sum⊥(ω), are composed of the sum of many slightly broadened δ-functional modes at many frequencies. The NMR relaxation is caused by the quasielastic mode in χ′′sum∥(ω) at around zero frequency. This quasielastic mode is characterized by two physical quantities, intensity P0∥ and frequency width Γ0∥. Although P0∥ has to date been assumed to be identical to the uniform static susceptibility, we point out that the two quantities are not identical. Without making this unreliable assumption for P0∥, we demonstrate experimentally how P0∥ and Γ0∥ behave, by analyzing the NMR relaxation rates of two different nuclei, H1 and C13, in a real HAFR. This analysis is more rigorous and thus can be used to estimate Γ0∥ and P0∥ more precisely than previously possible. We find that the temperature dependence of P0∥ exhibits activation-type behavior reflecting the first excitation gap. We also find that Γ0∥ decreases monotonically on cooling but saturates to a nonzero value at zero temperature. This strongly suggests that Γ0∥ is dominated not only by the electron-phonon interactions but also by internanomagnet dipole interactions, which have been neglected to date.","subitem_description_type":"Abstract"}]},"item_5_full_name_3":{"attribute_name":"著者別名","attribute_value_mlt":[{"nameIdentifiers":[{"nameIdentifier":"7682","nameIdentifierScheme":"WEKO"}],"names":[{"name":"五十嵐, 智志"}]},{"nameIdentifiers":[{"nameIdentifier":"7683","nameIdentifierScheme":"WEKO"}],"names":[{"name":"Igarashi, Satoshi"}]}]},"item_5_publisher_7":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"American Physical Society"}]},"item_5_relation_14":{"attribute_name":"DOI","attribute_value_mlt":[{"subitem_relation_type_id":{"subitem_relation_type_id_text":"info:doi/10.1103/PhysRevB.83.014404","subitem_relation_type_select":"DOI"}}]},"item_5_rights_15":{"attribute_name":"権利","attribute_value_mlt":[{"subitem_rights":"Copyright(C)2011 The American Physical Society"}]},"item_5_select_19":{"attribute_name":"著者版フラグ","attribute_value_mlt":[{"subitem_select_item":"publisher"}]},"item_5_source_id_11":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AA11187113","subitem_source_identifier_type":"NCID"}]},"item_5_source_id_9":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"10980121","subitem_source_identifier_type":"ISSN"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Itou, T."}],"nameIdentifiers":[{"nameIdentifier":"7676","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Sagane, T."}],"nameIdentifiers":[{"nameIdentifier":"7677","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Oyamada, A."}],"nameIdentifiers":[{"nameIdentifier":"7678","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Maegawa, S."}],"nameIdentifiers":[{"nameIdentifier":"7679","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Igarashi, S."}],"nameIdentifiers":[{"nameIdentifier":"7680","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Yukawa, Y."}],"nameIdentifiers":[{"nameIdentifier":"7681","nameIdentifierScheme":"WEKO"}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2019-07-29"}],"displaytype":"detail","filename":"83_014404_1-5.pdf","filesize":[{"value":"327.7 kB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"83_014404_1-5.pdf","url":"https://niigata-u.repo.nii.ac.jp/record/2262/files/83_014404_1-5.pdf"},"version_id":"f53961c5-7267-4cf1-bbd3-fd8dd4e3e6fc"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"eng"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"journal article","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"Low-frequency spin dynamics and NMR spin-lattice relaxation in antiferromagnetic rings","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Low-frequency spin dynamics and NMR spin-lattice relaxation in antiferromagnetic rings"},{"subitem_title":"Low-frequency spin dynamics and NMR spin-lattice relaxation in antiferromagnetic rings","subitem_title_language":"en"}]},"item_type_id":"5","owner":"1","path":["454","502"],"pubdate":{"attribute_name":"公開日","attribute_value":"2014-12-05"},"publish_date":"2014-12-05","publish_status":"0","recid":"2262","relation_version_is_last":true,"title":["Low-frequency spin dynamics and NMR spin-lattice relaxation in antiferromagnetic rings"],"weko_creator_id":"1","weko_shared_id":null},"updated":"2022-12-15T03:35:07.421430+00:00"}