Phase diagram of CeRuPO under pressure investigated by ${}^{31}$P-NMR - Comparison between CeRuPO under pressure and the Ce(Ru${}_{1-x}$Fe${}_x$)PO system -

Abstract

We have performed ${}^{31}$P-NMR measurements on single-crystalline CeRuPO under pressure in order to understand the variation in magnetic character against pressure. The NMR spectra for $H\perp c$ and $H\parallel c$ at 2.15GPa split below the ordered temperature, which is a microscopic evidence of the change in the magnetic ground state from the ferromagnetic (FM) state at ambient pressure to the antiferromagnetic (AFM) state under pressure. The analysis of NMR spectra suggests that the magnetic structure in AFM state is the stripe-type AFM state with the AFM moment $m_{\mathrm{AFM}}\perp c$-axis and changes by magnetic field perpendicular to $c$-axis. In addition, the dimensionality of magnetic correlations in the spin and the $k$ space is estimated. We reveal that three-dimensional magnetic correlations in CeRuPO are robust against pressure, which is quite different from the suppression of the magnetic correlations along the $c$-axis by Fe substitution in Ce(Ru${}_{1-x}$Fe${}_x$)PO.

arXiv comment7 pages, 6 figures, accepted for publication in Phys. Rev. B

References in corpus (14)

• Onset of antiferromagnetism in heavy fermion metals
• Quantum Phase Transitions in the Itinerant Ferromagnet ZrZn${}_2$
• Commensurate Itinerant Antiferromagnetism in BaFe2As2: 75As-NMR Studies on a Self-Flux Grown Single Crystal
• Coexistence of magnetism and superconductivity in CeRh1-xIrxIn5
• CeRuPO: A rare example of a Ferromagnetic Kondo lattice
• Ferromagnetic Quantum Critical Endpoint in UCoAl
• Evolution toward Quantum Critical End Point in UGe_2
• Disorder in a Quantum Critical Superconductor
• Stripe antiferromagnetic correlations in LaFeAsO1-xFx probed by 75As NMR
• Single crystal growth and anisotropy of CeRuPO
• Pressure-Temperature-Magnetic Field Phase Diagram of Ferromagnetic Kondo Lattice CeRuPO
• Metamagnetic Behavior and Kondo Breakdown in Heavy-Fermion CeFePO
• Ferromagnetic Quantum Critical Point in Heavy-Fermion Iron Oxypnictide Ce(Ru${}_{1-x}$Fe${}_x$)PO
• Ferromagnetic Quantum Critical Point Induced by Tuning the Magnetic Dimensionality of the Heavy-Fermion Iron Oxypnictide Ce(Ru${}_{1-x}$Fe${}_x$)PO

Cited by in corpus (3)

• Metallic Quantum Ferromagnets
• Avoided ferromagnetic quantum critical point in CeRuPO
• Influence of strain on the properties of CeRuPO and CeOsPO Kondo systems