On the local and itinerant properties of the ESR in YbRh₂Si₂

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• 作者：Jan Wykhoff ; Jö ; rg Sichelschmidt ; Gerard Lapertot ; Georg Knebel ; Jacques Flouquet ; Ilshat I. Fazlishanov ; Hans-Albrecht Krug von Nidda ; Cornelius Krellner ; Christoph Geibel ; Frank Steglich
• 关键词：Electron spin resonance ; Heavy fermion ; YbRh₂Si₂
• 刊名：Science and Technology of Advanced Materials
• 出版年：2007
• 出版时间：July 2007
• 年：2007
• 卷：8
• 期：5
• 页码：389-392
• 全文大小：216 K

文摘

Below the Kondo temperature the heavy Fermion compound YbRh₂Si₂ shows a well defined electron spin resonance (ESR) with local Yb³⁺ properties. We report a detailed analysis of the ESR intensity which gives information on the number of ESR active centers relative to the ESR of well localized Yb³⁺ in YPd₃:Yb. The ESR lineshape is investigated regarding contributions from itinerant centers. From the ESR of monoisotopic ¹⁷⁴YbRh₂Si₂ we could exclude unresolved hyperfine contributions to the lineshape.