HAL will be down for maintenance from Friday, June 10 at 4pm through Monday, June 13 at 9am. More information
Skip to Main content Skip to Navigation
Journal articles

Magnetic properties and crystal field in Pr$_2$ Zr$_2$ O$_7$

Abstract : In this work, we revisit the crystal field acting on the non-Kramers Pr$^{3+}$ ion (4f$^2$) in the quantum spin-ice candidate Pr$_2$ Zr$_2$ O$_7$ using both a standard calculation restricted to the ground spin-orbit multiplet and intermediate coupling states in the full basis of the f$^2$ configuration. Analysis of the thermal variation of the polycrystal magnetic susceptibility and of the local susceptibilities $\chi$⊥ and $\chi _\parallel$ determined by means of polarized neutron diffraction experiments reveals that the effective antiferromagnetic exchange is strongly depleted at low temperature with respect to its high-temperature value. We then discuss the influence of crystal field imperfections arising from residual strains, which are especially important for a non-Kramers ion. We find that they are an essential ingredient to account for the very low temperature $M(H)$ magnetization curves, showing that the saturation is not achieved even at 8 T. Furthermore, as possible candidates to qualitatively understand the Curie-like behavior observed below 0.5 K, we discuss the influence of the magnetic hyperfine interaction.
Document type :
Journal articles
Complete list of metadata

Cited literature [15 references]  Display  Hide  Download

https://hal-cea.archives-ouvertes.fr/cea-01550625
Contributor : Dominique Girard Connect in order to contact the contributor
Submitted on : Thursday, June 29, 2017 - 5:00:47 PM
Last modification on : Monday, December 13, 2021 - 9:16:33 AM
Long-term archiving on: : Thursday, January 18, 2018 - 2:24:40 AM

File

Bonville_PhysRevB_94_134428_20...
Publisher files allowed on an open archive

Identifiers

Citation

P. Bonville, S. Guitteny, A. Gukasov, I. Mirebeau, S. Petit, et al.. Magnetic properties and crystal field in Pr$_2$ Zr$_2$ O$_7$. Physical Review B: Condensed Matter and Materials Physics (1998-2015), American Physical Society, 2016, 94, pp.134428. ⟨10.1103/PhysRevB.94.134428⟩. ⟨cea-01550625⟩

Share

Metrics

Record views

56

Files downloads

277