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Pressure effects in the itinerant antiferromagnetic metal TiAu

MPG-Autoren
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Svanidze,  E.
Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Zitation

Wolowiec, C. T., Fang, Y., McElroy, C. A., Jeffries, J. R., Stillwell, R. L., Svanidze, E., et al. (2017). Pressure effects in the itinerant antiferromagnetic metal TiAu. Physical Review B, 95(21): 214403, pp. 1-10. doi:10.1103/PhysRevB.95.214403.


Zitierlink: https://hdl.handle.net/11858/00-001M-0000-002D-790A-A
Zusammenfassung
We report the pressure dependence of the Neel temperature T-N up to P approximate to 27 GPa for the recently discovered itinerant antiferromagnet (IAFM) TiAu. The T-N(P) phase boundary exhibits unconventional behavior in which the Neel temperature is enhanced from T-N approximate to 33 K at ambient pressure to a maximum of T-N approximate to 35 K occurring at P approximate to 5.5 GPa. Upon a further increase in pressure, T-N is monotonically suppressed to similar to 22 K at P approximate to 27 GPa. We also find a crossover in the temperature dependence of the electrical resistivity rho in the antiferromagnetic (AFM) phase that is coincident with the peak in T-N(P), such that the temperature dependence of rho = rho(0) + A(n)T(n) changes from n approximate to 3 during the enhancement of T-N to n approximate to 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 approximate to 45 GPa.