Magnetic Resonance of GdP

Abstract

Electron spin resonance measurements on single-crystal of GdP have been performed in the temperature range from 5 to 40 K and in the frequency range from 50 to 109 GHz to obtain microscopic information about the magnetic structure. The results obtained indicate that GdP is an “easy-plane” antiferromagnet with the magnetic moment lying in the {111} plane below the Néel temperature (∼18 K). The estimated values of the exchange field and the out-of-plane anisotropy field are μ₀H_E=4.5 T and μ₀H_A=1.7 T, respectively.