Kondo ion electron spin resonance in YbRh2(Si1-xGex)2(x = 0.05)

Sichelschmidt, J.; Ferstl, J.; Geibel, C.; Steglich, F.

doi:10.1016/j.physb.2004.12.042

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Kondo ion electron spin resonance in YbRh₂(Si_1-xGe_x)₂(x = 0.05)

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Sichelschmidt, J.
Jörg Sichelschmidt, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Ferstl, J.
Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Geibel, C.
Christoph Geibel, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Steglich, F.
Frank Steglich, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Sichelschmidt, J., Ferstl, J., Geibel, C., & Steglich, F. (2005). Kondo ion electron spin resonance in YbRh₂(Si_1-xGe_x)₂(x = 0.05). Physica B-Condensed Matter, 359-361, 17-19. doi:10.1016/j.physb.2004.12.042.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0015-2CDF-E

Abstract

We report electron spin resonance (ESR) results for the heavy fermion metal YbRh2(Si1-xGex)2(x=0.05)YbRh2(Si1-xGex)2(x=0.05), where Ge doping suppresses the antiferromagnetic (AFM) ordering and thus brings the system very close to a AFM quantum critical point. The well-defined properties of the ESR signal demonstrate its origin from the Kondo ion Yb3+Yb3+ itself. A comparison with previous ESR results on the Ge-undoped compound stresses the need for a ESR-consistent local moment screening temperature close to zero. Our results are consistent with the localized moment scenario of quantum criticality.