Chemical pressure tuning of via isoelectronic substitution of Ru with Fe
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Univ. of California, San Diego, La Jolla, CA (United States)
- The United States Naval Academy, Annapolis, MD (United States); National Institute of Standards and Technology, Gaithersburg, MD (United States)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Florida State Univ., Tallahassee, FL (United States)
- National Institute of Standards and Technology, Gaithersburg, MD (United States)
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.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- FG02-04ER46105; DMR-0802478; AC52-06NA25396
- OSTI ID:
- 1193437
- Alternate ID(s):
- OSTI ID: 1179979
- Report Number(s):
- LA-UR-14-29641; PRBMDO
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Vol. 91, Issue 8; ISSN 1098-0121
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
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Single Crystal Growth of URu2Si2 by the Modified Bridgman Technique
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Hidden order and beyond: an experimental—theoretical overview of the multifaceted behavior of URu 2 Si 2
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journal | January 2020 |
Pressure-induced rotational symmetry breaking in URu2Si2
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