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Title: Pressure effects in the itinerant antiferromagnetic metal TiAu

Abstract

Here, we report the pressure dependence of the Néel temperature T N up to P ≈ 27 GPa for the recently discovered itinerant antiferromagnet (IAFM) TiAu. The T N(P) phase boundary exhibits unconventional behavior in which the Néel temperature is enhanced from T N ≈ 33 K at ambient pressure to a maximum of T N ≈ 35 K occurring at P ≈ 5.5 GPa. Upon a further increase in pressure, T N is monotonically suppressed to ~22 K at P ≈ 27 GPa. We also find a crossover in the temperature dependence of the electrical resistivity ρ in the antiferromagnetic (AFM) phase that is coincident with the peak in T N(P), such that the temperature dependence of ρ = ρ 0 + A nT n changes from n≈3 during the enhancement of T N to n ≈ 2 during the suppression of T N. Based on an extrapolation of the T N(P) data to a possible pressure-induced quantum critical point, we estimate the critical pressure to be P c ≈ 45 GPa.

Authors:
 [1];  [1];  [2];  [3];  [3];  [4];  [5];  [5];  [3];  [6];  [1]
  1. Univ. of California, San Diego, La Jolla, CA (United States)
  2. Univ. of California, San Diego, La Jolla, CA (United States); Vacuum Process Engineering, Sacramento, CA (United States)
  3. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  4. Rice Univ., Houston, TX (United States); Max Planck Institute for Chemical Physics of Solids, Dresden (Germany)
  5. Rice Univ., Houston, TX (United States)
  6. Univ. of Alabama at Birmingham, Birmingham, AL (United States)
Publication Date:
Research Org.:
Univ. of California, San Diego, La Jolla, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1377067
Grant/Contract Number:
NA0002909; AC52-07NA27344; NA0002928; 14-ERD-041
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 95; Journal Issue: 21; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Wolowiec, C. T., Fang, Y., McElroy, C. A., Jeffries, J. R., Stillwell, R. L., Svanidze, E., Santiago, J. M., Morosan, E., Weir, S. T., Vohra, Y. K., and Maple, M. B. Pressure effects in the itinerant antiferromagnetic metal TiAu. United States: N. p., 2017. Web. doi:10.1103/PhysRevB.95.214403.
Wolowiec, C. T., Fang, Y., McElroy, C. A., Jeffries, J. R., Stillwell, R. L., Svanidze, E., Santiago, J. M., Morosan, E., Weir, S. T., Vohra, Y. K., & Maple, M. B. Pressure effects in the itinerant antiferromagnetic metal TiAu. United States. doi:10.1103/PhysRevB.95.214403.
Wolowiec, C. T., Fang, Y., McElroy, C. A., Jeffries, J. R., Stillwell, R. L., Svanidze, E., Santiago, J. M., Morosan, E., Weir, S. T., Vohra, Y. K., and Maple, M. B. 2017. "Pressure effects in the itinerant antiferromagnetic metal TiAu". United States. doi:10.1103/PhysRevB.95.214403.
@article{osti_1377067,
title = {Pressure effects in the itinerant antiferromagnetic metal TiAu},
author = {Wolowiec, C. T. and Fang, Y. and McElroy, C. A. and Jeffries, J. R. and Stillwell, R. L. and Svanidze, E. and Santiago, J. M. and Morosan, E. and Weir, S. T. and Vohra, Y. K. and Maple, M. B.},
abstractNote = {Here, we report the pressure dependence of the Néel temperature TN up to P ≈ 27 GPa for the recently discovered itinerant antiferromagnet (IAFM) TiAu. The TN(P) phase boundary exhibits unconventional behavior in which the Néel temperature is enhanced from TN ≈ 33 K at ambient pressure to a maximum of TN ≈ 35 K occurring at P ≈ 5.5 GPa. Upon a further increase in pressure, TN is monotonically suppressed to ~22 K at P ≈ 27 GPa. We also find a crossover in the temperature dependence of the electrical resistivity ρ in the antiferromagnetic (AFM) phase that is coincident with the peak in TN(P), such that the temperature dependence of ρ = ρ0 + AnTn changes from n≈3 during the enhancement of TN to n ≈ 2 during the suppression of TN. Based on an extrapolation of the TN(P) data to a possible pressure-induced quantum critical point, we estimate the critical pressure to be Pc ≈ 45 GPa.},
doi = {10.1103/PhysRevB.95.214403},
journal = {Physical Review B},
number = 21,
volume = 95,
place = {United States},
year = 2017,
month = 6
}

Journal Article:
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