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Title: Investigation of the commensurate magnetic structure in the heavy-fermion compound CePt 2 In 7 using magnetic resonant x-ray diffraction

In this paper, we investigated the magnetic structure of the heavy-fermion compound CePt 2In 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 = (1/2, 1/2, 1/2) 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., Phys. Rev. B 83, 140408 (2011)] that was previously attributed to an incommensurate order. We also report powder x-ray diffraction showing that the crystallographic structure of CePt 2In 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 those of the Ce-115 family. Broad diffraction peaks confirm the presence of pronounced strain in polycrystalline samples of CePt 2In 7.more » Lastly, we discuss how strain effects can lead to different electronic and magnetic properties between polycrystalline and single crystal samples.« less
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [5] ; ORCiD logo [5] ;  [6]
  1. Laboratory for Scientific Developments and Novel Materials, Paul Scherrer Institut (Switzerland)
  2. European Synchrotron Radiation Facility (France); University of Liverpool (United Kingdom)
  3. Laboratory for Synchrotron Radiation, Paul Scherrer Institut (Switzerland)
  4. Advanced Science Research Center, Japan Atomic Energy Agency (Japan)
  5. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  6. Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institut (Switzerland)
Publication Date:
Report Number(s):
LA-UR-17-22945
Journal ID: ISSN 2469-9950; PRBMDO
Grant/Contract Number:
AC52-06NA25396
Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 96; Journal Issue: 6; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Research Org:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Antiferromagnetism; Heavy-fermion systems; Unconventional superconductors; X-ray powder diffraction; X-ray resonant magnetic scattering
OSTI Identifier:
1414109
Alternate Identifier(s):
OSTI ID: 1374772