Pressure-induced suppression of ferromagnetism in CePd$_2$P$_2$
T. A. Elmslie, D. VanGennep, W. Bi, Y. Lai, S. T. Weir, Y. K. Vohra,, R. E. Baumbach, and J. J. Hamlin
TL;DR
This study investigates how applying pressure suppresses ferromagnetism in CePd$_2$P$_2$, revealing its disappearance near 12 GPa without structural change, thus providing insights into quantum critical behavior.
Contribution
The paper presents the first detailed phase diagram of CePd$_2$P$_2$ under high pressure, showing ferromagnetism suppression without structural transition, avoiding disorder effects from chemical substitution.
Findings
Ferromagnetism vanishes near 12 GPa
No change in crystal structure up to 25 GPa
Pressure effectively tunes magnetic order
Abstract
The correlated electron material CePdP crystallizes in the ThCrSi structure and orders ferromagnetically at 29 K. Lai et al. [Phys. Rev. B 97, 224406 (2018)] found evidence for a ferromagnetic quantum critical point induced by chemical compression via substitution of Ni for Pd. However, disorder effects due to the chemical substitution interfere with a simple analysis of the possible critical behavior. In the present work, we examine the temperature - pressure - magnetic field phase diagram of single crystalline CePdP to 25 GPa using a combination of resistivity, magnetic susceptibility, and x-ray diffraction measurements. We find that the ferromagnetism appears to be destroyed near 12 GPa, without any change in the crystal structure.
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