Effect of pressure on the electron spin resonance of a heavy-fermion metal

J. Sichelschmidt, J. Wykhoff, T. Gruner, C. Krellner, C. Klingner, C. Geibel, F. Steglich, H.-A. Krug von Nidda, D. V. Zakharov, A. Loidl, and I. Fazlizhanov
Phys. Rev. B 81, 205116 – Published 20 May 2010

Abstract

We investigate the electron-spin-resonance (ESR) phenomenon in the heavy-fermion metal YbRh2Si2 by applying hydrostatic pressure up to 3 GPa and by inducing the internal pressure on the Yb site chemically in Yb(Rh1xCox)2Si2 samples. We found that the increase in pressure, reducing the hybridization between 4f and conduction electrons, leads to a remarkable change in the temperature dependence of the g factor and broadens the ESR line. We relate the differences between the effect of internal and external pressure on the low-temperature ESR parameters to the disorder induced by Co doping. The pressure effects on the Yb3+-related resonance in YbRh2Si2 again manifest its local character when compared with the resonance of diluted Gd in heavy-fermion metals.

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  • Received 18 March 2010

DOI:https://doi.org/10.1103/PhysRevB.81.205116

©2010 American Physical Society

Authors & Affiliations

J. Sichelschmidt, J. Wykhoff, T. Gruner, C. Krellner, C. Klingner, C. Geibel, and F. Steglich

  • Max Planck Institute for Chemical Physics of Solids, D-01187 Dresden, Germany

H.-A. Krug von Nidda, D. V. Zakharov, and A. Loidl

  • Experimental Physics V, Center for Electronic Correlations and Magnetism, University of Augsburg, D-86135 Augsburg, Germany

I. Fazlizhanov

  • E. K. Zavoisky Physical Technical Institute, 420029 Kazan, Russia

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Issue

Vol. 81, Iss. 20 — 15 May 2010

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