Evolution of the Kondo state of YbRh2Si2 probed by high-field ESR.

@article{Schaufu2009EvolutionOT,
  title={Evolution of the Kondo state of YbRh2Si2 probed by high-field ESR.},
  author={U. Schaufu{\ss} and Vladislav Kataev and Andrei A Zvyagin and Bernd B{\"u}chner and J{\"o}rg Sichelschmidt and Jan Wykhoff and Cornelius Krellner and Christoph Geibel and Frank Steglich},
  journal={Physical review letters},
  year={2009},
  volume={102 7},
  pages={
          076405
        }
}
An electron spin resonance (ESR) study of the heavy fermion compound YbRh2Si2 for fields up to approximately 8 T reveals a strongly anisotropic signal in the Kondo state below approximately 25 K. A similarity between the T dependence of the ESR parameters and that of the specific heat and the 29Si nuclear magnetic resonance data gives evidence that the ESR response is given by heavy fermions. Tuning the Kondo effect on the 4f states with magnetic fields approximately 2-8 T and temperature 2-25… Expand
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References

SHOWING 1-10 OF 22 REFERENCES
Field-induced suppression of the heavy-fermion state in YbRh2Si2.
We report dc-magnetization measurements on YbRh2Si2 at temperatures down to 0.04 K, magnetic fields B< or =11.5 T, and under hydrostatic pressure P< or =1.3 GPa. At ambient pressure a kink at B* =9.9Expand
Electron spin resonance in YbRh2Si2: The role of the residual linewidth
We present electron spin resonance (ESR) investigations of the La-doped heavy fermion metal YbRh2Si2 and of undoped samples which differ in their low-temperature charge transport properties. TheExpand
Low temperature electron spin resonance of the Kondo ion in a heavy fermion metal: YbRh2Si2.
We report an electron spin resonance (ESR) study on single crystals of the heavy fermion metal YbRh2Si2 which shows pronounced non-Fermi liquid behavior related to a close antiferromagnetic quantumExpand
YbRh2Si2: spin fluctuations in the vicinity of a quantum critical point at low magnetic field.
TLDR
A 29Si NMR study on aligned single crystals of YbRh2Si2 which shows behavior characteristic of a quantum critical point (QCP: T(N)-->0) strongly suggests the development of antiferromagnetic fluctuations with finite q vectors that compete with q=0 spin fluctuations in the vicinity of the QCP near H=0.5 kOe. Expand
Magnetic properties close to the quantum critical point in YbRh2Si2
The tetragonal heavy fermion system YbRh 2 Si 2 is located very close to a magnetic quantum critical point, related to the suppression of weak antiferromagnetic ordering by a magnetic field of 0.06 TExpand
YbRh2Si2: Pronounced Non-Fermi-Liquid Effects above a Low-Lying Magnetic Phase Transition
We report the first observation of non-Fermi-liquid (NFL) effects in a clean Yb compound at ambient pressure and zero magnetic field. The electrical resistivity and the specific-heat coefficient ofExpand
High-field phase diagram of the heavy-fermion metal YbRh2Si2
The tetragonal heavy-fermion (HF) metal YbRh2Si2 (Kondo temperature TK≈ 25 K) exhibits a magnetic field-induced quantum critical point related to the suppression of very weak antiferromagnetic (AF)Expand
Relevance of ferromagnetic correlations for the electron spin resonance in Kondo lattice systems.
TLDR
Electron spin resonance (ESR) measurements of the ferromagnetic Kondo lattice system CeRuPO show a well defined ESR signal which is related to the Ce3+ magnetism, and point out ESR as a prime method to investigate directly the spin dynamics of the Kondo ion. Expand
ESR Study of the Kondo Effect in A u : Yb
Paramagnetic resonance experiments at 3 and 9 GHz were performed in dilute $Au:\mathrm{Yb}$ in the temperature range from 100 mK to 4 K. All results show for the first time a logarithmic temperatureExpand
Crystalline electric field excitations of the non-Fermi-liquid YbRh2Si2
Abstract We report on inelastic neutron scattering experiments on YbRh 2 Si 2 powder to study the magnetic excitation spectrum. The high-energy magnetic response at T = 1.5 K extends beyond 55 meVExpand
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