Anisotropic electron spin resonance of YbIr2Si2

作者：Gruner T^*; Wykhoff J; Sichelschmidt J; Krellner C; Geibel C; Steglich F

来源：Journal of Physics: Condensed Matter , 2010, 22(13): 135602.

DOI：10.1088/0953-8984/22/13/135602

A series of electron spin resonance (ESR) experiments were performed on a single crystal of the heavy fermion metal YbIr2Si2 to map out the anisotropy of the ESR-intensity I-ESR which is governed by the microwave field component of the g-factor. The temperature dependencies of I-ESR(T) and g(T) were measured for different orientations and compared within the range 2.6 K <= T <= 16 K. The analysis of the intensity dependence on the crystal orientation with respect to both the direction of the microwave field and the static magnetic field revealed remarkable features: the intensity variation with respect to the direction of the microwave field was found to be one order of magnitude smaller than expected from the g-factor anisotropy. Furthermore, we observed a weak basal plane anisotropy of the ESR parameters which we interpret to be an intrinsic sample property.

• 出版日期2010-4-7