Abstract

Neutron-diffraction experiments have been performed in order to clarify the magnetic structures of CeP under pressures above 1.9 GPa using a sapphire-anvil cell. The P–T phase diagram up to 2.8 GPa has been investigated. Some new phases have been found, for example the phase 2+ (↑ ↑ ↓ ↓ ° ° ↑ ↑) under the pressure of 1.9 GPa. Type-IA antiferromagnetic structure (↑ ↑ ↓ ↓) was found below 22.5 and 45 K at 1.9 and 2.2 GPa, respectively. A phase characterized by the wave vector k=1/3 and a ferromagnetic phase were observed in the pressure range 2.5–2.8 GPa.

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