Ordered magnetic and quadrupolar states under hydrostatic pressure in orthorhombic PrCu2
T. Naka, L. A. Ponomarenko, A. de Visser, A. Matsushita, R. Settai and, Y. Onuki
TL;DR
This study investigates how hydrostatic pressure influences magnetic and quadrupolar states in PrCu2, revealing a transition from Van Vleck paramagnetism to antiferromagnetism and changes in quadrupolar configurations.
Contribution
It provides new insights into pressure-induced magnetic and quadrupolar phase transitions in PrCu2 using susceptibility and resistivity measurements.
Findings
Pressure induces a Van Vleck paramagnet-to-antiferromagnet transition at 1.2 GPa.
Magnetic moments lie in the ac-plane in the pressure-induced magnetic state.
Changes in quadrupolar states under pressure are linked to observed magnetic phenomena.
Abstract
We report magnetic susceptibility and electrical resistivity measurements on single-crystalline PrCu2 under hydrostatic pressure, up to 2 GPa, which pressure range covers the pressure-induced Van Vleck paramagnet-to-antiferromagnet transition at 1.2 GPa. The measured anisotropy in the susceptibility shows that in the pressure-induced magnetic state the ordered 4f-moments lie in the ac-plane. We propose that remarkable pressure effects on the susceptibility and resistivity are due to changes in the quadrupolar state of O22 and/or O20 under pressure. We present a simple analysis in terms of the singlet-singlet model.
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