Angle-dependent electron spin resonance of YbRh2Si2 measured with planar microwave resonators and in-situ rotation

作者：Bondorf Linda; Beutel Manfred; Thiemann Markus; Dressel Martin; Bothner Daniel; Sichelschmidt Jorg; Kliemt Kristin; Krellner Cornelius; Scheffler Marc^*

来源：Physica B: Condensed Matter , 2018, 536: 331-334.

DOI：10.1016/j.physb.2017.10.046

• Heavy fermion
• YbRh2Si2
• Anisotropy
• Electron spin resonance
• Microwave chip

We present a new experimental approach to investigate the magnetic properties of the anisotropic heavy-fermion system YbRh2Si2 as a function of crystallographic orientation. Angle-dependent electron spin resonance (ESR) measurements are performed at a low temperature of 1.6 K and at an ESR frequency of 4.4 GHz utilizing a superconducting planar microwave resonator in a He-4-cryostat in combination with in-situ sample rotation. The obtained ESR g-factor of YbRh2Si2 as a function of the crystallographic angle is consistent with results of previous measurements using conventional ESR spectrometers at higher frequencies and fields. Perspectives to implement this experimental approach into a dilution refrigerator and to reach the magnetically ordered phase of YbRh2Si2 are discussed.

• 出版日期2018-5-1