Magnetism in RCo2 (R = Dy, Ho, Er, Tm) Under Hydrostatic Pressure |
| J. Prchal, J. Šebesta, J. Valenta, M. Míšek, D. Turčinková, L. Lapčák, J. Prokleška, M. Kratochvílová and V. Sechovský
Charles University in Prague, Faculty of Mathematics and Physics, DCMP, Ke Karlovu 5, 121 16 Prague 2, Czech Republic |
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| The short-range parimagnetic configurations, observed in the heavy rare-earth RCo2 compounds in paramagnetic range far above the Curie temperature TC, consist in formation of ferromagnetic cobalt clusters antiferromagnetically coupled to the neighboring R magnetic moments. The characteristic temperature of the onset of parimagnetism Tf is very sensitive to changes of external conditions like pressure or composition. The pressure coefficients ∂Tf/∂p and ∂TC/∂p are comparable, indicating a close connection of underlying mechanisms. Our recent measurements indicate systematic evolution of the pressure coefficients with spanning the rare-earth series from Dy through Tm in RCo2 with a specific case TmCo2. |
DOI: 10.12693/APhysPolA.126.288 PACS numbers: 75.20.En, 75.50.Gg |