{"title":"SLOW PARAMAGNETIC RELAXATION OF HIGH-SPIN IRON III IN A TRIGONAL BIPYRAMIDAL ENVIRONMENT A STUDY OF THE PENTA-AZIDO FERRATE ION, FE(N3)52-","authors":"W. Reiff, H. Wong, M. Tuiroc, G. Eisman","doi":"10.1051/JPHYSCOL/1979234","DOIUrl":null,"url":null,"abstract":"The temperature dependence of the zero field Mossbauer spectrum of [ϕ 4 As] 2 [Fe(N 3 ) 5 ] il has been determined over the range 300 K to 1.60 K and exhibits the effects of paramagnetic relaxation broadening and magnetic hyperfine splitting (H n ~ 486 kG a 4,2 K) at low temperatures corresponding to a negative zero field splitting, D ~ -1 cm -l . These results are consistent with the isolated trigonal bipyramidal Fe(N 3 ) 5 2- anion known to be present in this compound and slow spin-spin relaxation between highly separated (11 A or greater) metal centers. D || > µ ⊥ with [Formula: see PDF file] at ~5 K. The X and Q band ESR spectra of the system over the range 300 to 3.6 K indicate a typical axial Fe 3+ compound but with slight rhombicity of the local FeN 5 coordination environment.","PeriodicalId":17944,"journal":{"name":"Le Journal De Physique Colloques","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"1996-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Le Journal De Physique Colloques","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1051/JPHYSCOL/1979234","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
The temperature dependence of the zero field Mossbauer spectrum of [ϕ 4 As] 2 [Fe(N 3 ) 5 ] il has been determined over the range 300 K to 1.60 K and exhibits the effects of paramagnetic relaxation broadening and magnetic hyperfine splitting (H n ~ 486 kG a 4,2 K) at low temperatures corresponding to a negative zero field splitting, D ~ -1 cm -l . These results are consistent with the isolated trigonal bipyramidal Fe(N 3 ) 5 2- anion known to be present in this compound and slow spin-spin relaxation between highly separated (11 A or greater) metal centers. D || > µ ⊥ with [Formula: see PDF file] at ~5 K. The X and Q band ESR spectra of the system over the range 300 to 3.6 K indicate a typical axial Fe 3+ compound but with slight rhombicity of the local FeN 5 coordination environment.
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