Weak magnetic anisotropy in GdRh${}_2$Si${}_2$ studied by magnetic resonance

Abstract

The antiferromagnetically (AFM) ordered state of GdRh${}_2$Si${}_2$ which consists of AFM-stacked ferromagnetic layers is investigated by magnetic resonance spectroscopy. The almost isotropic Gd${}^{3+}$ paramagnetic resonance becomes anisotropic in the AFM ordered region below 107 K. The emerging internal anisotropic exchange-fields are still small enough to allow an investigation of their magnetization dynamics by using a standard microwave-frequency magnetic resonance technique. We could characterize this anisotropy in detail in the ferromagnetic layers of the excitation at 9 and 34 GHz. We derived a resonance condition for the AFM ordered phase to describe the weak in-plane anisotropic behaviour in combination with a mean-field analysis.

7 pages

References in corpus (3)

• GdRh${}_2$Si${}_2$: An exemplary tetragonal system for antiferromagnetic order with weak in-plane anisotropy
• Single crystal growth and characterization of GdRh${}_2$Si${}_2$
• Numeric calculation of antiferromagnetic resonance frequencies for the noncollinear antiferromagnet

Cited by in corpus (3)

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