Pressure-temperature phase diagram ofUPd2Si2and

Abstract

It is well established that the ternary intermetallic family of compounds UT 2 Si 2 , where T denotes a transition metal, shows a rich variety of electronic and magnetic ground-state properties. In order to better understand the magnetic properties of these materials, we have investigated the behavior of the electrical resistivity of UNi 2 Si 2 and UPd 2 Si 2 as a function of temperature and pressure. In the case of UNi 2 Si 2 , the proposed pressure-temperature phase diagram is very similar to its magnetic-field-temperature phase diagram. The pressure-temperature phase diagram obtained for both compounds is also compared to predictions made using a mean-field Landau-type analysis. ͓S0163-1829͑98͒02809-4͔

Neutron Scattering Study on Commensurate and Incommensurate Antiferromagnetic Phases in UPd2Si2under Uniaxial Stress

“…We have found that applying σ along the [010] direction stabilizes the C-AF phase through tuning the competition between the C-and IC-AF orders. This tendency is clearly indicated by the increases of T Nl and q z under σ. Interestingly, the presently obtained σ − T phase diagram closely resembles the pressure p versus temperature phase diagram proposed by the resistivity measurements [10,11]. In general, it is expected that compressions using p and σ || [010] yield the different types of strain.…”

Effect of a three-site four-spin interaction on theS=1axial third-nearest-neighbor Ising model: Application to the magnetic phase diagrams ofUNi2Muraoka1 2001Phys. Rev. B8020View full textAdd to dashboardCite

“…Quirion et al determined the pressure-temperature phase diagrams for UNi 2 Si 2 and UPd 2 Si 2 by measuring the resistivity and compared these phase diagrams to predictions made using a mean-filed Landau-type analysis. 23 For UPd 2 Si 2 this analysis has reproduced qualitative features found in the experimental results. For UNi 2 Si 2 , however, this approach has been incompatible with the observed magnetic ground state.…”

“…The pressure-temperature phase diagram for UNi 2 Si 2 has been obtained. 21,23 It is similar to the magnetic-fieldtemperature phase diagram and it seems that the effect of the pressure is the same as that of the magnetic field in UNi 2 Si 2 . Quirion et al determined the pressure-temperature phase diagrams for UNi 2 Si 2 and UPd 2 Si 2 by measuring the resistivity and compared these phase diagrams to predictions made using a mean-filed Landau-type analysis.…”

Magnetovolume effects and thep-Tmagnetic phase diagram ofUNi2Honda1, Sechovský2, Oomi3 et al. 2001Phys. Rev. B5100View full textAdd to dashboardCite

“…2. Electrical resistivity studies of UNi 2 Si 2 exerted to an external hydrostatic pressure revealed that the value of T 1 (T 2 ) becomes strongly increased ͑weakly decreased͒, whereas T N seems to be pressure invariant. 5,6,9 As a result of pressure effects on T 1 and T 2 , the temperature range of the stability of AF-I is narrowing and vanishes above 3.2 GPa. 6 To discuss these phenomena from a thermodynamic point of view, highly accurate thermal expansion data of UNi 2 Si 2 at ambient pressure were strongly desired.…”