Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2008-08-19
Physics
Condensed Matter
Strongly Correlated Electrons
7 pages, 6 figures, submitted to Eur. Phys. J. B
Scientific paper
10.1140/epjb/e2008-00428-x
We report a study of the low-temperature high-pressure phase diagram of the intermetallic compound PrCu$_2$, by means of molecular-field calculations and $^{63,65}$Cu nuclear-quadrupole-resonance (NQR) measurements under pressure. The pressure-induced magnetically-ordered phase can be accounted for by considering the influence of the crystal electric field on the $4f$ electron orbitals of the Pr$^{3+}$ ions and by introducing a pressure-dependent exchange interaction between the corresponding local magnetic moments. Our experimental data suggest that the order in the induced antiferromagnetic phase is incommensurate. The role of magnetic fluctuations both at high and low pressures is also discussed.
Onuki Yoshichika
Ott Hans-Rudolf
Sacchetti Andrea
Weller Manfred
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