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Title: Pressure dependence of the magnetic order in CrAs: a neutron diffraction investigation

Abstract

The suppression of magnetic order with pressure concomitant with the appearance of pressure-induced superconductivity was recently discovered in CrAs. Here we present a neutron diffraction study of the pressure evolution of the helimagnetic ground-state towards and in the vicinity of the superconducting phase. Neutron diffraction on polycrystalline CrAs was employed from zero pressure to 0.65 GPa and at various temperatures. The helimagnetic long-range order is sustained under pressure and the magnetic propagation vector does not show any considerable change. The average ordered magnetic moment is reduced from 1.73(2) μB at ambient pressure to 0.4(1) μB close to the critical pressure Pc ≈ 0.7 GPa, at which magnetic order is completely suppressed. The width of the magnetic Bragg peaks strongly depends on temperature and pressure, showing a maximum in the region of the onset of superconductivity. In conclusion, we interpret this as associated with competing ground-states in the vicinity of the superconducting phase.

Authors:
 [1];  [1];  [2];  [3];  [3];  [3];  [4];  [5]
+ Show Author Affiliations
  1. Paul Scherrer Inst., Villigen (Switzerland). Lab. for Neutron Scattering and Imaging
  2. Ecole Polytechnique Federale Lausanne (Switzlerland). Lab. for Quantum Magnetism (LQM)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division
  4. Ecole Polytechnique Federale Lausanne (Switzlerland). Lab. for Quantum Magnetism (LQM); RIKEN Centre for Emergent Matter Science (CEMS), Waki (Japan)
  5. Paul Scherrer Inst., Villigen (Switzerland). Lab. for Neutron Scattering and Imaging; Univ. of Geneva (Switzerland). Dept. of Quantum Matter Physics
Publication Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1185828
Alternate Identifier(s):
OSTI ID: 1181132
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review. B, Condensed Matter and Materials Physics
Additional Journal Information:
Journal Volume: 91; Journal Issue: 2; Journal ID: ISSN 1098-0121
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Keller, L., White, J. S., Babkevich, P., Susner, Michael A., Sims, Zachary C, Safa-Sefat, Athena, Ronnow, H. M., and Ruegg, Ch. Pressure dependence of the magnetic order in CrAs: a neutron diffraction investigation. United States: N. p., 2015. Web. doi:10.1103/PhysRevB.91.020409.
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Keller, L., White, J. S., Babkevich, P., Susner, Michael A., Sims, Zachary C, Safa-Sefat, Athena, Ronnow, H. M., & Ruegg, Ch. Pressure dependence of the magnetic order in CrAs: a neutron diffraction investigation. United States. https://doi.org/10.1103/PhysRevB.91.020409
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Keller, L., White, J. S., Babkevich, P., Susner, Michael A., Sims, Zachary C, Safa-Sefat, Athena, Ronnow, H. M., and Ruegg, Ch. Thu . "Pressure dependence of the magnetic order in CrAs: a neutron diffraction investigation". United States. https://doi.org/10.1103/PhysRevB.91.020409. https://www.osti.gov/servlets/purl/1185828.
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@article{osti_1185828,
title = {Pressure dependence of the magnetic order in CrAs: a neutron diffraction investigation},
author = {Keller, L. and White, J. S. and Babkevich, P. and Susner, Michael A. and Sims, Zachary C and Safa-Sefat, Athena and Ronnow, H. M. and Ruegg, Ch.},
abstractNote = {The suppression of magnetic order with pressure concomitant with the appearance of pressure-induced superconductivity was recently discovered in CrAs. Here we present a neutron diffraction study of the pressure evolution of the helimagnetic ground-state towards and in the vicinity of the superconducting phase. Neutron diffraction on polycrystalline CrAs was employed from zero pressure to 0.65 GPa and at various temperatures. The helimagnetic long-range order is sustained under pressure and the magnetic propagation vector does not show any considerable change. The average ordered magnetic moment is reduced from 1.73(2) μB at ambient pressure to 0.4(1) μB close to the critical pressure Pc ≈ 0.7 GPa, at which magnetic order is completely suppressed. The width of the magnetic Bragg peaks strongly depends on temperature and pressure, showing a maximum in the region of the onset of superconductivity. In conclusion, we interpret this as associated with competing ground-states in the vicinity of the superconducting phase.},
doi = {10.1103/PhysRevB.91.020409},
journal = {Physical Review. B, Condensed Matter and Materials Physics},
number = 2,
volume = 91,
place = {United States},
year = {Thu Jan 29 00:00:00 EST 2015},
month = {Thu Jan 29 00:00:00 EST 2015}
}
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Journal Article:
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Publisher's Version of Record
https://doi.org/10.1103/PhysRevB.91.020409
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Works referenced in this record:

Superconductivity in the vicinity of antiferromagnetic order in CrAs
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  • Saparov, Bayrammurad; Mitchell, Jonathan E.; Sefat, Athena S.
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  • Journal of Applied Physics, Vol. 40, Issue 3
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    Works referencing / citing this record:

    Spiral magnetic order and pressure-induced superconductivity in transition metal compounds
    journal, October 2016

    • Wang, Yishu; Feng, Yejun; Cheng, J. -G.
    • Nature Communications, Vol. 7, Issue 1
    • DOI: 10.1038/ncomms13037

    Pressure-induced electronic phase separation of magnetism and superconductivity in CrAs
    journal, September 2015

    • Khasanov, Rustem; Guguchia, Zurab; Eremin, Ilya
    • Scientific Reports, Vol. 5, Issue 1
    • DOI: 10.1038/srep13788

    High pressure research using muons at the Paul Scherrer Institute
    journal, March 2016

    Multiple band crossings and Fermi surface topology: Role of double nonsymmorphic symmetries in MnP-type crystal structures
    journal, September 2019

    Pressure-induced electronic phase separation of magnetism and superconductivity in CrAs
    text, January 2015

    Raman scattering study of lattice and magnetic excitations in CrAs
    text, January 2019

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