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Title: Chemical pressure tuning of URu 2 Si 2 via isoelectronic substitution of Ru with Fe

Abstract

We have used specific heat and neutron diffraction measurements on single crystals of URu 2–xFe xSi₂ for Fe concentrations x ≤ 0.7 to establish that chemical substitution of Ru with Fe acts as “chemical pressure” P ch as previously proposed by Kanchanavatee et al. [Phys. Rev. B 84, 245122 (2011)] based on bulk measurements on polycrystalline samples. Neutron diffraction reveals a sharp increase of the uranium magnetic moment at x = 0.1, reminiscent of the behavior at the “hidden order” to large moment antiferromagnetic (LMAFM) phase transition observed at a pressure P x ≈ 0.5-0.7 GPa in URu₂Si₂. Using the unit cell volume determined from our measurements and an isothermal compressibility κ T = 5.2×10⁻³ GPa⁻¹ for URu₂Si₂, we determine the chemical pressure P ch in URu 2-xFe xSi₂ as a function of x. The resulting temperature T-chemical pressure P ch phase diagram for URu 2-xFe xSi₂ is in agreement with the established temperature T-external pressure P phase diagram of URu₂Si₂.

Authors:
 [1];  [2];  [3];  [2];  [4];  [1];  [2];  [2];  [2];  [5];  [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Univ. of California, San Diego, La Jolla, CA (United States)
  3. The United States Naval Academy, Annapolis, MD (United States); National Institute of Standards and Technology, Gaithersburg, MD (United States)
  4. Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Florida State Univ., Tallahassee, FL (United States)
  5. National Institute of Standards and Technology, Gaithersburg, MD (United States)
Publication Date:
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)
OSTI Identifier:
1193437
Alternate Identifier(s):
OSTI ID: 1179979
Report Number(s):
LA-UR-14-29641
Journal ID: ISSN 1098-0121; PRBMDO
Grant/Contract Number:
FG02-04ER46105; DMR-0802478; AC52-06NA25396
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review. B, Condensed Matter and Materials Physics
Additional Journal Information:
Journal Volume: 91; Journal Issue: 8; Journal ID: ISSN 1098-0121
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Das, Pinaki, Kanchanavatee, N., Helton, J. S., Huang, K., Baumbach, R. E., Bauer, E. D., White, B. D., Burnett, V. W., Maple, M. B., Lynn, J. W., and Janoschek, M. Chemical pressure tuning of URu2Si2 via isoelectronic substitution of Ru with Fe. United States: N. p., 2015. Web. doi:10.1103/PhysRevB.91.085122.
Das, Pinaki, Kanchanavatee, N., Helton, J. S., Huang, K., Baumbach, R. E., Bauer, E. D., White, B. D., Burnett, V. W., Maple, M. B., Lynn, J. W., & Janoschek, M. Chemical pressure tuning of URu2Si2 via isoelectronic substitution of Ru with Fe. United States. doi:10.1103/PhysRevB.91.085122.
Das, Pinaki, Kanchanavatee, N., Helton, J. S., Huang, K., Baumbach, R. E., Bauer, E. D., White, B. D., Burnett, V. W., Maple, M. B., Lynn, J. W., and Janoschek, M. Thu . "Chemical pressure tuning of URu2Si2 via isoelectronic substitution of Ru with Fe". United States. doi:10.1103/PhysRevB.91.085122. https://www.osti.gov/servlets/purl/1193437.
@article{osti_1193437,
title = {Chemical pressure tuning of URu2Si2 via isoelectronic substitution of Ru with Fe},
author = {Das, Pinaki and Kanchanavatee, N. and Helton, J. S. and Huang, K. and Baumbach, R. E. and Bauer, E. D. and White, B. D. and Burnett, V. W. and Maple, M. B. and Lynn, J. W. and Janoschek, M.},
abstractNote = {We have used specific heat and neutron diffraction measurements on single crystals of URu2–xFexSi₂ for Fe concentrations x ≤ 0.7 to establish that chemical substitution of Ru with Fe acts as “chemical pressure” Pch as previously proposed by Kanchanavatee et al. [Phys. Rev. B 84, 245122 (2011)] based on bulk measurements on polycrystalline samples. Neutron diffraction reveals a sharp increase of the uranium magnetic moment at x = 0.1, reminiscent of the behavior at the “hidden order” to large moment antiferromagnetic (LMAFM) phase transition observed at a pressure Px ≈ 0.5-0.7 GPa in URu₂Si₂. Using the unit cell volume determined from our measurements and an isothermal compressibility κT = 5.2×10⁻³ GPa⁻¹ for URu₂Si₂, we determine the chemical pressure Pch in URu2-xFexSi₂ as a function of x. The resulting temperature T-chemical pressure Pch phase diagram for URu2-xFexSi₂ is in agreement with the established temperature T-external pressure P phase diagram of URu₂Si₂.},
doi = {10.1103/PhysRevB.91.085122},
journal = {Physical Review. B, Condensed Matter and Materials Physics},
number = 8,
volume = 91,
place = {United States},
year = {Thu Feb 26 00:00:00 EST 2015},
month = {Thu Feb 26 00:00:00 EST 2015}
}

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Cited by: 15 works
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