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Title: Phase diagram and thermal expansion measurements on the system URu 2–xFe xSi 2

Thermal expansion, electrical resistivity, magnetization, and specific heat measurements were performed on URu 2–xFe xSi 2 single crystals for various values of Fe concentration x in both the hidden-order (HO) and large-moment antiferromagnetic (LMAFM) regions of the phase diagram. Our results show that the paramagnetic (PM) to HO and LMAFM phase transitions are manifested differently in the thermal expansion coefficient. The uniaxial pressure derivatives of the HO/LMAFM transition temperature T0 change dramatically when crossing from the HO to the LMAFM phase. The energy gap also changes consistently when crossing the phase boundary. In addition, for Fe concentrations at x c≈ 0.1, we observe two features in the thermal expansion upon cooling, one that appears to be associated with the transition from the PM to the HO phase and another one at lower temperature that may be due to the transition from the HO to the LMAFM phase.
Authors:
 [1] ;  [1] ;  [2] ;  [1] ;  [1] ;  [1] ;  [2] ;  [3] ;  [3] ;  [3] ;  [3] ;  [3] ;  [4] ;  [5]
  1. Univ. of California, San Diego, CA (United States). Dept. of Physics and Center for Advanced Nanoscience
  2. Univ. of California, San Diego, CA (United States). Center for Advanced Nanoscience and Materials Science and Engineering Program
  3. Quantum Design Inc., San Diego, CA (United States)
  4. Temple Univ., Philadelphia, PA (United States). Physics Dept.
  5. Univ. of California, San Diego, CA (United States). Dept. of Physics and Center for Advanced Nanoscience and Materials Science and Engineering
Publication Date:
Grant/Contract Number:
NA0002909; FG02-01ER45872; FG02-04ER46105
Type:
Published Article
Journal Name:
Proceedings of the National Academy of Sciences of the United States of America
Additional Journal Information:
Journal Volume: 113; Journal Issue: 47; Journal ID: ISSN 0027-8424
Publisher:
National Academy of Sciences, Washington, DC (United States)
Research Org:
Univ. of California, San Diego, CA (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; thermal expansion; URu2Si2; hidden order
OSTI Identifier:
1331396
Alternate Identifier(s):
OSTI ID: 1336816; OSTI ID: 1361433

Ran, Sheng, Wolowiec, Christian T., Jeon, Inho, Pouse, Naveen, Kanchanavatee, Noravee, White, Benjamin D., Huang, Kevin, Martien, Dinesh, DaPron, Tyler, Snow, David, Williamsen, Mark, Spagna, Stefano, Riseborough, Peter S., and Maple, M. Brian. Phase diagram and thermal expansion measurements on the system URu2–xFexSi2. United States: N. p., Web. doi:10.1073/pnas.1616542113.
Ran, Sheng, Wolowiec, Christian T., Jeon, Inho, Pouse, Naveen, Kanchanavatee, Noravee, White, Benjamin D., Huang, Kevin, Martien, Dinesh, DaPron, Tyler, Snow, David, Williamsen, Mark, Spagna, Stefano, Riseborough, Peter S., & Maple, M. Brian. Phase diagram and thermal expansion measurements on the system URu2–xFexSi2. United States. doi:10.1073/pnas.1616542113.
Ran, Sheng, Wolowiec, Christian T., Jeon, Inho, Pouse, Naveen, Kanchanavatee, Noravee, White, Benjamin D., Huang, Kevin, Martien, Dinesh, DaPron, Tyler, Snow, David, Williamsen, Mark, Spagna, Stefano, Riseborough, Peter S., and Maple, M. Brian. 2016. "Phase diagram and thermal expansion measurements on the system URu2–xFexSi2". United States. doi:10.1073/pnas.1616542113.
@article{osti_1331396,
title = {Phase diagram and thermal expansion measurements on the system URu2–xFexSi2},
author = {Ran, Sheng and Wolowiec, Christian T. and Jeon, Inho and Pouse, Naveen and Kanchanavatee, Noravee and White, Benjamin D. and Huang, Kevin and Martien, Dinesh and DaPron, Tyler and Snow, David and Williamsen, Mark and Spagna, Stefano and Riseborough, Peter S. and Maple, M. Brian},
abstractNote = {Thermal expansion, electrical resistivity, magnetization, and specific heat measurements were performed on URu2–xFexSi2 single crystals for various values of Fe concentration x in both the hidden-order (HO) and large-moment antiferromagnetic (LMAFM) regions of the phase diagram. Our results show that the paramagnetic (PM) to HO and LMAFM phase transitions are manifested differently in the thermal expansion coefficient. The uniaxial pressure derivatives of the HO/LMAFM transition temperature T0 change dramatically when crossing from the HO to the LMAFM phase. The energy gap also changes consistently when crossing the phase boundary. In addition, for Fe concentrations at xc≈ 0.1, we observe two features in the thermal expansion upon cooling, one that appears to be associated with the transition from the PM to the HO phase and another one at lower temperature that may be due to the transition from the HO to the LMAFM phase.},
doi = {10.1073/pnas.1616542113},
journal = {Proceedings of the National Academy of Sciences of the United States of America},
number = 47,
volume = 113,
place = {United States},
year = {2016},
month = {11}
}