High Frequency Electron Spin Resonance in Mn1-xFexSi
- Samarin, A.N.
- Semeno, A.V.
- Gilmanov, M.I.
- Glushkov, V.V.
- Lobanova, I.I.
- Samarin, N.A.
- Sluchanko, N.E.
- Sannikov, I.I.
- Chubova, N.M.
- Dyadkin, V.A.
- S.V.Grigoriev,
- Demishev, S.V.
Publication date
December 2015
DOI Publisher
The Authors. Published by Elsevier B.V. ISSN
1875-3892 Citation count (estimate)
1Abstract
AbstractHigh frequency (60 GHz) electron spin resonance (ESR) has been studied for the quantum critical system Mn1−xFexSi (0 < x < 0.24) at temperatures up to 50 K by using the original experimental technique. The analysis of ESR line shape allowed detecting the full set of spectroscopic parameters (oscillating magnetization, line width and g factor). The violation of classical Korringa-type relaxation and scaling behavior of the ESR line width was found to a result from iron doping. Non-Fermi-liquid effects in the temperature dependence of the ESR line width observed at quantum critical points x* = 0.11 and xc = 0.24 are shown to be described quantitatively in the theory by Wölfle and Abrahams
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