Pressure effects in the itinerant antiferromagnetic metal TiAu
- Univ. of California, San Diego, La Jolla, CA (United States); University of California, San Diego
- Univ. of California, San Diego, La Jolla, CA (United States)
- Univ. of California, San Diego, La Jolla, CA (United States); Vacuum Process Engineering, Sacramento, CA (United States)
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Rice Univ., Houston, TX (United States); Max Planck Institute for Chemical Physics of Solids, Dresden (Germany)
- Rice Univ., Houston, TX (United States)
- Univ. of Alabama at Birmingham, Birmingham, AL (United States)
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.
- Research Organization:
- Univ. of California, San Diego, La Jolla, CA (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA)
- Grant/Contract Number:
- NA0002909
- OSTI ID:
- 1377067
- Journal Information:
- Physical Review B, Journal Name: Physical Review B Journal Issue: 21 Vol. 95; ISSN 2469-9950; ISSN PRBMDO
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Itinerant magnetic metals
|
journal | August 2017 |
Effects of chemical disorder in the itinerant antiferromagnet Ti 1− x V x Au
|
journal | August 2018 |
Similar Records
Anomalous connection between antiferromagnetic and superconducting phases in the pressurized noncentrosymmetric heavy-fermion compound
Pressure effects on antiferromagnetism in UNiAl