Valence and magnetic transitions in YbInCu4probed using63Cu nuclear quadrupole resonance under high pressure
Year: 2005
Type: article
Abstract: Applying pressure to the valence fluctuating compound YbInCu 4 lowers the valence transition temperature and stabilizes the high temperature (HT) localized spin state. For pressure above 2.4 GPa, the valence transition is completely suppressed and the magnetically ordered state arises as a new ground state below 2.4 K. In order to elucidate microscopically the relation between the valence and magnetic transitions in f electron system, we performed 63 Cu NQR measurements of YbInCu 4 under pressure up to 2.5 GPa. The experimental results provide clear evidence for the onset of the magnetic ordering in the pressure-stabilized HT state above 2.3 GPa. The nuclear spin–lattice relaxation rate 1/ T 1 in the HT state shows 1/ T 1 = constant behaviour down to 3.0 K and a divergence increase just below 2.4 K. We concluded that the pressure-stabilized localized electron state of YbInCu 4 transforms directly into a magnetically ordered state, without displaying any intermediate heavy Fermi liquid behaviour.
Authors: T Koyama, M Nakamura, T Mito, S Wada, J L Sarrao
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W1965683099