Muon spin relaxation study of spin dynamics in the extended kagome systems YBaCo4O7+delta (delta=0,0.1)
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Lee, S. | - |
dc.contributor.author | Lee, Wonjun | - |
dc.contributor.author | Lee, K. J. | - |
dc.contributor.author | Kim, ByungJun | - |
dc.contributor.author | Suh, B. J. | - |
dc.contributor.author | Zheng, H. | - |
dc.contributor.author | Mitchell, J. F. | - |
dc.contributor.author | Choi, K. -Y. | - |
dc.date.available | 2019-01-22T14:03:55Z | - |
dc.date.issued | 2018-03 | - |
dc.identifier.issn | 2469-9950 | - |
dc.identifier.issn | 2469-9969 | - |
dc.identifier.uri | https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/1070 | - |
dc.description.abstract | We present muon spin relaxation (mu SR) measurements of the extended kagome systems YBaCo4O7+delta (delta = 0,0.1), comprising two interpenetrating kagome sublattice of Co(I)(3+) (S = 3/2) and a triangle sublattice of Co(II)(2+) (S = 2). The zero-and longitudinal-field mu SR spectra of the stoichiometric compound YBaCo4O7 unveil that the triangular subsystem orders at T-N = 101 K. In contrast, the muon spin relaxation rate pertaining to the kagome subsystem shows persistent spin dynamics down to T = 20 K and then a sublinear decrease lambda(T) similar to T-0.66(5) on cooling towards T = 4 K. In addition, the introduction of interstitial oxygen (delta = 0.1) is found to drastically affect the magnetism. For the fast-cooling experiment (> 10 K/min), YBaCo4O7.1 enters a regime characterized by persistent spin dynamics below 90 K. For the slow-cooling experiment (1 K/min), evidence is obtained for the phase separation into interstitial oxygen-poor and oxygen-rich regions with distinct correlation times. The observed temperature, cooling rate, and oxygen content dependencies of spin dynamics are discussed in terms of a broad range of spin-spin correlation times, relying on a different degree of frustration between the kagome and triangle sublattices as well as of oxygen migration. | - |
dc.publisher | AMER PHYSICAL SOC | - |
dc.title | Muon spin relaxation study of spin dynamics in the extended kagome systems YBaCo4O7+delta (delta=0,0.1) | - |
dc.type | Article | - |
dc.identifier.doi | 10.1103/PhysRevB.97.104409 | - |
dc.identifier.bibliographicCitation | PHYSICAL REVIEW B, v.97, no.10 | - |
dc.description.isOpenAccess | N | - |
dc.identifier.wosid | 000427601000003 | - |
dc.identifier.scopusid | 2-s2.0-85043975915 | - |
dc.citation.number | 10 | - |
dc.citation.title | PHYSICAL REVIEW B | - |
dc.citation.volume | 97 | - |
dc.type.docType | Article | - |
dc.subject.keywordPlus | GEOMETRICALLY FRUSTRATED ANTIFERROMAGNETS | - |
dc.subject.keywordPlus | TRIANGULAR HEISENBERG-MODEL | - |
dc.subject.keywordPlus | LATTICE | - |
dc.subject.keywordPlus | ORDER | - |
dc.subject.keywordPlus | CAPABILITY | - |
dc.subject.keywordPlus | BEHAVIOR | - |
dc.subject.keywordPlus | Y2MO2O7 | - |
dc.subject.keywordPlus | STATE | - |
dc.relation.journalResearchArea | Materials Science | - |
dc.relation.journalResearchArea | Physics | - |
dc.relation.journalWebOfScienceCategory | Materials Science, Multidisciplinary | - |
dc.relation.journalWebOfScienceCategory | Physics, Applied | - |
dc.relation.journalWebOfScienceCategory | Physics, Condensed Matter | - |
dc.description.journalRegisteredClass | sci | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.
84, Heukseok-ro, Dongjak-gu, Seoul, Republic of Korea (06974)02-820-6194
COPYRIGHT 2019 Chung-Ang University All Rights Reserved.
Certain data included herein are derived from the © Web of Science of Clarivate Analytics. All rights reserved.
You may not copy or re-distribute this material in whole or in part without the prior written consent of Clarivate Analytics.