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. The dilution of Yb by non-magnetic La leaves the temperature dependence of ESR parameters qualitatively uncha...

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Veröffentlicht in:	Physica. C, Superconductivity Superconductivity, 2007-09, Vol.460-462, p.686-687
Hauptverfasser:	Wykhoff, J., Sichelschmidt, J., Ferstl, J., Krellner, C., Geibel, C., Steglich, F., Fazlishanov, I., von Nidda, H.-A. Krug
Format:	Artikel
Sprache:	eng
Schlagworte:	Electron spin resonance Heavy fermions Yb-compounds
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Zusammenfassung:	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. The dilution of Yb by non-magnetic La leaves the temperature dependence of ESR parameters qualitatively unchanged. A comparison with various undoped samples shows that the residual, zero temperature ESR linewidth is a key parameter for the spin dynamics seen by the ESR active entities in YbRh2Si2.
ISSN:	0921-4534 1873-2143
DOI:	10.1016/j.physc.2007.03.123