{"title":"On the Interaction of Paramagnetic Point Defects in Heavy Metal Fluoride Glasses","authors":"G. Scholz, R. Stösser, T. Grande, S. Aasland","doi":"10.1002/bbpc.199700041","DOIUrl":null,"url":null,"abstract":"<p>The origin and nature of ESR signals of fluoride glasses (ZBLAN: ZrF<sub>4</sub>/BaF<sub>2</sub>/LaF<sub>3</sub>/AlF<sub>3</sub>/NaF) doped both with Fe<sup>3+</sup> and Fe<sup>2+</sup> ions was studied using the temperature and microwave power (<i>P</i><sub>MW</sub>) dependencies as well as a complete simulation of the X-band ESR spectra. For the first time, evidence is given for the existence of {Fe<sup>II</sup>-OH-Fe<sup>III</sup>} units (<i>S</i>' = 9/2) formed in the glasses involving traces of O<sub>2</sub> and H<sub>2</sub>O present in the samples. Fluoride glassy matrices constrain the formation of interacting species and therefore nonuniform spatial distributions of the dopants. Reasons are seen (i) in the local structural chemistry (geometrical and charge compensation reasons), and (ii) in the melting and post-melting processes.</p>","PeriodicalId":100156,"journal":{"name":"Berichte der Bunsengesellschaft für physikalische Chemie","volume":"101 9","pages":"1291-1296"},"PeriodicalIF":0.0000,"publicationDate":"2014-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/bbpc.199700041","citationCount":"5","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Berichte der Bunsengesellschaft für physikalische Chemie","FirstCategoryId":"1085","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/bbpc.199700041","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 5
Abstract
The origin and nature of ESR signals of fluoride glasses (ZBLAN: ZrF4/BaF2/LaF3/AlF3/NaF) doped both with Fe3+ and Fe2+ ions was studied using the temperature and microwave power (PMW) dependencies as well as a complete simulation of the X-band ESR spectra. For the first time, evidence is given for the existence of {FeII-OH-FeIII} units (S' = 9/2) formed in the glasses involving traces of O2 and H2O present in the samples. Fluoride glassy matrices constrain the formation of interacting species and therefore nonuniform spatial distributions of the dopants. Reasons are seen (i) in the local structural chemistry (geometrical and charge compensation reasons), and (ii) in the melting and post-melting processes.
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