J. Kaštil

Pressure-induced quantum phase transition in the itinerant ferromagnet UCoGa

In this paper, we report the results of a high pressure study of the itinerant 5f-electron ferromagnet UCoGa. The work is focused on probing the expected ferromagnet-to-paramagnet quantum phase transition induced by high pressure and on the general features of the P-T(-H) phase diagram. Diamond anvil cells were employed to measure the magnetization and electrical resistivity under pressures up to ~ 10 this http URL ambient pressure, UCoGa exhibits collinear ferromagnetic ordering of uranium magnetic moments {\mu}U ~ 0.74 {\mu}B (at 2 K) aligned along the c-axis of the hexagonal crystal structure below Curie temperature TC = 48K. With the application of pressure, gradual decrease of both, TC and the saturated magnetic moment, has been observed up to pressures ~ 6 GPa. This is followed by a sharp drop of magnetic moment and a sudden disappearance of the magnetic order at the pressure of 6.5 GPa, suggesting a first-order phase transition, as expected for a clean system. The low temperature power law dependence of the electrical resistivity shows distinct anomalies around the ~ 6 GPa, consistent with the pressure evolution of the magnetic moment and the ordering temperature. The tricritical point of the UCoGa phase diagram is located at approximately ~ 30 K and ~ 6 GPa.

Non-collinear antiferromagnetic structure in PrCuAl

We report on the magnetic structure in PrCuAl as determined by powder neutron diffraction. This compound crystallizes in the hexagonal ZrNiAl-type structure and the bulk measurements indicated an antiferromagnetic order in PrCuAl below TN = 7.9 K. Our neutron-diffraction data confirmed the antiferromagnetic order below TN and revealed the propagation vector (1/3, 1/3, 1/3). The Pr magnetic moments lie within the basal plane and form a triangular structure. This magnetic structure differs from antiferromagnetic structures observed in other RCuAl or RNiAl compounds that are mostly characterized by (1/2, 0, q) propagation.

Antiferromagnetism and phase transitions in noncentrosymmetric UIrSi3

Magnetization and specific heat measurements on a UIrSi3 single crystal reveal Ising-like antiferromagnetism below T

Pressure evolution of magnetism in URhGa

_N

The influence of substitutions on the magnetocaloric effect in RCo2 compounds

= 41.7 K with easy magnetization direction along the c-axis of tetragonal structure. The antiferromagentic ordering is suppressed by magnetic fields > H

Magnetocaloric effect of Gd-Tb alloys: influence of the sample shape anisotropy

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Magnetic and magnetocaloric properties of partially disordered RFeAl (R = Gd, Tb) intermetallic

({\mu}

Anisotropic magnetocaloric effect in TbNiAl

_0

Electronic properties of PrNi1−xCuxAl compounds

H

Effect of pressure and high magnetic field on phase transitions and magnetic properties of Ni1.92Mn1.56Sn0.52 and Ni2MnSn Heusler compounds

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