Investigation of the commensurate magnetic structure in heavy fermion CePt2In7 using magnetic resonant X-ray diffraction

Abstract

We investigated the magnetic structure of the heavy fermion compound CePt${}_2$In${}_7$ below $T_N=5.34(2)$ K using magnetic resonant X-ray diffraction at ambient pressure. The magnetic order is characterized by a commensurate propagation vector $k_{1/2}=\left(\frac{1}{2},\frac{1}{2},\frac{1}{2}\right)$ with spins lying in the basal plane. Our measurements did not reveal the presence of an incommensurate order propagating along the high symmetry directions in reciprocal space but cannot exclude other incommensurate modulations or weak scattering intensities. The observed commensurate order can be described equivalently by either a single-$k$ structure or by a multi-$k$ structure. Furthermore we explain how a commensurate-only ordering may explain the broad distribution of internal fields observed in nuclear quadrupolar resonance experiments (Sakai et al. 2011, Phys. Rev. B 83 140408) that was previously attributed to an incommensurate order. We also report powder X-ray diffraction showing that the crystallographic structure of CePt${}_2$In${}_7$ changes monotonically with pressure up to $P=7.3$ GPa at room temperature. The determined bulk modulus $B_0=81.1(3)$ GPa is similar to the ones of the Ce-115 family. Broad diffraction peaks confirm the presence of pronounced strain in polycrystalline samples of CePt${}_2$In${}_7$. We discuss how strain effects can lead to different electronic and magnetic properties between polycrystalline and single crystal samples.

arXiv comment9 pages, 6 figures. Accepted in PRB

References in corpus (25)

• Quantum Criticality in Heavy Fermion Metals
• Dynamical Mean-Field Theory within the Full-Potential Methods: Electronic structure of Ce-115 materials
• Hidden Magnetism and Quantum Criticality in the Heavy Fermion Superconductor CeRhIn5
• Modelling the Localized to Itinerant Electronic Transition in the Heavy Fermion System CeIrIn5
• Magnetic structure of CeRhIn_5 as a function of pressure and temperature
• Magnetic structure of Cd-doped CeCoIn5
• Correlation between the phase diagram and the crystal-field wave functions of CeRh(1-x)Ir(x)In5
• Novel Coexistence of Superconductivity with Two Distinct Magnetic Orders
• Competition between unconventional superconductivity and incommensurate antiferromagnetic order in CeRh1-xCoxIn5
• Magnetic order in Ce0.95Nd0.05CoIn5: the Q-phase at zero magnetic field
• Compressibility of $CeMI{n}_5$ and $C{e}_{2}MI{n}_8$ (M = Rh, Ir and Co) Compounds
• Pressure Induced Change in the Magnetic Modulation of CeRhIn5
• New Magnetic State in Incommensurate Magnetic Phase of Heavy-Fermion Superconductor CeRh0.6Co0.4In5
• Pressure phase diagram and quantum criticality of CePt2In7 single crystals
• Commensurate Antiferromagnetism in CePt2In7, a Nearly Two-Dimensional Heavy Fermion System
• Hyperfine Interactions in the Heavy Fermion CeMIn_5 Systems
• Low temperature magnetic structure of CeRhIn${}_5$ by neutron diffraction on absorption-optimized samples
• Pairing Correlations Near a Kondo-Destruction Quantum Critical Point
• Crystal structure and electronic structure of CePt2In7
• Optical spectroscopy and ultrafast pump-probe studies on the heavy fermion compound CePt${}_2$In${}_7$
• Magnetic Order in the 2D Heavy-Fermion System CePt2In7 studied by muSR
• Specific heat in high magnetic fields and magnetic phase diagram of CePt${}_2$In${}_7$
• Determination of the magnetic structure of CePt${}_2$In${}_7$ by means of neutron diffraction
• Spin liquid versus long range magnetic order in the frustrated body-centered tetragonal lattice
• Spin liquid versus long range magnetic order in the frustrated body-centered tetragonal lattice

Cited by in corpus (4)

• A microscopic Kondo lattice model for the heavy fermion antiferromagnet CeIn${}_3$
• Successive magnetic transitions in heavy fermion superconductor Ce3PtIn11 studied by 115In nuclear quadrupole resonance
• Determination of the magnetic q vectors in the heavy fermion superconductor Ce3PtIn11
• Quasi-two-dimensional Fermi surfaces with localized $f$ electrons in the layered heavy-fermion compound CePt${}_2$In${}_7$