{"title":"Evidence for Cu3+ in YBa2Cu3O7−δ from ESR measurements: A reassessment","authors":"M.D. Sastry","doi":"10.1016/0378-4363(88)90306-3","DOIUrl":null,"url":null,"abstract":"<div><p>Blank et al. [Physica 145B (1987) 222] in a recent letter reported Q-band ESR measurements on YBa<sub>2</sub>Cu<sub>3</sub>O<sub>7−δ</sub> suggesting the presence of 10 to 15% of Cu<sup>3+</sup>. It is shown in this article that their assignment of the ESR line at <em>g</em>=2.08 to Cu<sup>3+</sup> is incorrect. Further it is pointed out that the assignment of this line to low-spin Cu<sup>4+</sup> cannot be ruled out.</p></div>","PeriodicalId":101023,"journal":{"name":"Physica B+C","volume":"151 3","pages":"Pages 513-514"},"PeriodicalIF":0.0000,"publicationDate":"1988-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0378-4363(88)90306-3","citationCount":"2","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Physica B+C","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/0378436388903063","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 2
Abstract
Blank et al. [Physica 145B (1987) 222] in a recent letter reported Q-band ESR measurements on YBa2Cu3O7−δ suggesting the presence of 10 to 15% of Cu3+. It is shown in this article that their assignment of the ESR line at g=2.08 to Cu3+ is incorrect. Further it is pointed out that the assignment of this line to low-spin Cu4+ cannot be ruled out.
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