High-pressure study of the phase transition in the itinerant ferromagnet CoS2
Date
2011-02-24
Authors
Sidorov, V.
Krashnorussky, V.
Petrova, Alla
Utyuzh, A.
Yuhasz, W.
Lograsso, Thomas
Thompson, J.
Stishov, Sergei
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Lograsso, Thomas
Ames Laboratory Division Director
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Ames National Laboratory
Abstract
Electrical resistivity and magnetic susceptibility measurements of the itinerant ferromagnet CoS2 at high pressures reveal that its magnetic ordering temperature is tuned to zero at a critical pressure 4.8 GPa, indicating the existence of a quantum-phase transition. The ambient pressure continuous magnetic-phase transition in CoS2 becomes first order on a very slight pressure increase, with a tricritical point probably located almost at ambient pressure. No deviations from Fermi-liquid behavior were found in the vicinity of the quantum-phase transition in CoS2, implying its strong first-order nature.
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This article is from Physical Review B 83 (2011): 060412(R), doi:10.1103/PhysRevB.83.060412.
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Sat Jan 01 00:00:00 UTC 2011