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Title: High-pressure investigations on the semi-Heusler compound CuMnSb

Abstract

The antiferromagnetic semi-Heusler compound CuMnSb has been investigated under high pressure by electrical resistivity and angle dispersive synchrotron x-ray diffraction measurements to 53 and 36 GPa, respectively. The Néel temperature at ~50 K is found to initially increase rapidly with pressure, reaching 83 K at 7 GPa. However, near 8 GPa at ambient temperature a sluggish first-order structural transition begins from a semimetallic cubic phase to a likely semimetallic tetragonal phase; thermal cycling to 355°C at 9.6 GPa serves to complete the transition. In the tetragonal phase no sign of magnetic ordering is visible in the resistivity R(T) over the measured temperature range 4–295 K. This suggests that magnetic ordering may have shifted to temperatures well above ambient. Indeed, density functional calculations find the magnetic ground state in the tetragonal phase to be antiferromagnetic. In conclusion, following decompression to 1 bar at ambient temperature, the high-pressure tetragonal phase is retained.

Authors:
 [1];  [1];  [2];  [3];  [1];  [3];  [3];  [1];  [3];  [1]
+ Show Author Affiliations
  1. Washington Univ., St. Louis, MO (United States)
  2. Argonne National Lab. (ANL), Argonne, IL (United States); Univ. of Illinois at Urbana-Champaign, Urbana, IL (United States)
  3. Technical Univ. Munich, Garching (Germany)
Publication Date:
Research Org.:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1477731
Alternate Identifier(s):
OSTI ID: 1467142
Grant/Contract Number:  
AC02-06CH11357; FC52-08NA28554; NA0001974
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 98; Journal Issue: 5; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Malavi, Pallavi, Song, Jing, Bi, Wenli, Regnat, Alexander, Zhu, Linghan, Bauer, Andreas, Senyshyn, Anatoliy, Yang, Li, Pfleiderer, Christian, and Schilling, James S. High-pressure investigations on the semi-Heusler compound CuMnSb. United States: N. p., 2018. Web. doi:10.1103/PhysRevB.98.054431.
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Malavi, Pallavi, Song, Jing, Bi, Wenli, Regnat, Alexander, Zhu, Linghan, Bauer, Andreas, Senyshyn, Anatoliy, Yang, Li, Pfleiderer, Christian, & Schilling, James S. High-pressure investigations on the semi-Heusler compound CuMnSb. United States. https://doi.org/10.1103/PhysRevB.98.054431
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Malavi, Pallavi, Song, Jing, Bi, Wenli, Regnat, Alexander, Zhu, Linghan, Bauer, Andreas, Senyshyn, Anatoliy, Yang, Li, Pfleiderer, Christian, and Schilling, James S. Tue . "High-pressure investigations on the semi-Heusler compound CuMnSb". United States. https://doi.org/10.1103/PhysRevB.98.054431. https://www.osti.gov/servlets/purl/1477731.
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@article{osti_1477731,
title = {High-pressure investigations on the semi-Heusler compound CuMnSb},
author = {Malavi, Pallavi and Song, Jing and Bi, Wenli and Regnat, Alexander and Zhu, Linghan and Bauer, Andreas and Senyshyn, Anatoliy and Yang, Li and Pfleiderer, Christian and Schilling, James S.},
abstractNote = {The antiferromagnetic semi-Heusler compound CuMnSb has been investigated under high pressure by electrical resistivity and angle dispersive synchrotron x-ray diffraction measurements to 53 and 36 GPa, respectively. The Néel temperature at ~50 K is found to initially increase rapidly with pressure, reaching 83 K at 7 GPa. However, near 8 GPa at ambient temperature a sluggish first-order structural transition begins from a semimetallic cubic phase to a likely semimetallic tetragonal phase; thermal cycling to 355°C at 9.6 GPa serves to complete the transition. In the tetragonal phase no sign of magnetic ordering is visible in the resistivity R(T) over the measured temperature range 4–295 K. This suggests that magnetic ordering may have shifted to temperatures well above ambient. Indeed, density functional calculations find the magnetic ground state in the tetragonal phase to be antiferromagnetic. In conclusion, following decompression to 1 bar at ambient temperature, the high-pressure tetragonal phase is retained.},
doi = {10.1103/PhysRevB.98.054431},
journal = {Physical Review B},
number = 5,
volume = 98,
place = {United States},
year = {Tue Aug 28 00:00:00 EDT 2018},
month = {Tue Aug 28 00:00:00 EDT 2018}
}
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https://doi.org/10.1103/PhysRevB.98.054431
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