TY - JOUR
T1 - Collapse of the Kondo state and ferromagnetic quantum phase transition in YbFe2Zn20
AU - Kaluarachchi, Udhara S.
AU - Xiang, Li
AU - Ying, Jianjun
AU - Kong, Tai
AU - Struzhkin, Viktor
AU - Gavriliuk, Alexander
AU - Bud'Ko, Sergey L.
AU - Canfield, Paul C.
N1 - Funding Information:
We would like to thank A. Kaminski for assisting in preparation the gaskets that are used for the pressure cell. This work was carried out at the Iowa State University and supported by the US DOE, Basic Energy Sciences, Materials Science and Engineering Division under Contract No. DE-AC02-07CH11358. L.X. was supported, in part, by the W. M. Keck Foundation. The research at the Geophysical Laboratory was supported by DOE/BES under Contract No. DE-FG02-99ER45775. A.G.G. acknowledges support of RSF 16-12-10464 grant. For preparation of high-pressure cells, the facilities of Center for Collective Use “Accelerator Center for Neutron Research of the Structure of Substance and Nuclear Medicine” of the INR RAS were used.
Funding Information:
We would like to thank A. Kaminski for assisting in preparation the gaskets that are used for the pressure cell. This work was carried out at the Iowa State University and supported by the US DOE, Basic Energy Sciences, Materials Science and Engineering Division under Contract No. DE-AC02-07CH11358. L.X. was supported, in part, by the W. M. Keck Foundation. The research at the Geophysical Laboratory was supported by DOE/BES under Contract No. DE-FG02-99ER45775. A.G.G. acknowledges support of RSF 16-12-10464 grant. For preparation of high-pressure cells, the facilities of Center for Collective Use Accelerator Center for Neutron Research of the Structure of Substance and Nuclear Medicine of the INR RAS were used.
Publisher Copyright:
© 2018 American Physical Society.
PY - 2018/11/5
Y1 - 2018/11/5
N2 - We present the electrical resistivity data under application of pressures up to ∼26 GPa and down to 50 mK on YbFe2Zn20. We find a pressure induced magnetic phase transition with an onset at pc=18.2±0.8 GPa. At ambient pressure, YbFe2Zn20 manifests a heavy fermion, nonmagnetic ground state and the Fermi liquid behavior at low temperatures. As pressure is increased, the power law exponent in resistivity, n, deviates significantly from Fermi liquid behavior and tends to saturate with n=1 near pc. A pronounced resistivity maximum Tmax, which scales with the Kondo temperature, is observed. Tmax decreases with increasing pressure and flattened out near pc indicating the suppression of Kondo exchange interaction. For p>pc,Tmax shows a sudden upward shift, most likely becoming associated with crystal electric field scattering. Application of magnetic field for p>pc broadens the transition and shifts it toward the higher temperature, which is a typical behavior of a transition towards a ferromagnetic state, or a state with a significant ferromagnetic component. The magnetic transition appears to abruptly develop above pc, suggesting probable first-order (with changing pressure) nature of the transition; once stabilized, the ordering temperature does not depend on pressure up to ∼26 GPa. Taken as a whole, these data suggest that YbFe2Zn20 has a quantum phase transition at pc=18.2 GPa associated with the avoided quantum criticality in metallic ferromagnets.
AB - We present the electrical resistivity data under application of pressures up to ∼26 GPa and down to 50 mK on YbFe2Zn20. We find a pressure induced magnetic phase transition with an onset at pc=18.2±0.8 GPa. At ambient pressure, YbFe2Zn20 manifests a heavy fermion, nonmagnetic ground state and the Fermi liquid behavior at low temperatures. As pressure is increased, the power law exponent in resistivity, n, deviates significantly from Fermi liquid behavior and tends to saturate with n=1 near pc. A pronounced resistivity maximum Tmax, which scales with the Kondo temperature, is observed. Tmax decreases with increasing pressure and flattened out near pc indicating the suppression of Kondo exchange interaction. For p>pc,Tmax shows a sudden upward shift, most likely becoming associated with crystal electric field scattering. Application of magnetic field for p>pc broadens the transition and shifts it toward the higher temperature, which is a typical behavior of a transition towards a ferromagnetic state, or a state with a significant ferromagnetic component. The magnetic transition appears to abruptly develop above pc, suggesting probable first-order (with changing pressure) nature of the transition; once stabilized, the ordering temperature does not depend on pressure up to ∼26 GPa. Taken as a whole, these data suggest that YbFe2Zn20 has a quantum phase transition at pc=18.2 GPa associated with the avoided quantum criticality in metallic ferromagnets.
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U2 - 10.1103/PhysRevB.98.174405
DO - 10.1103/PhysRevB.98.174405
M3 - Article
AN - SCOPUS:85056273921
SN - 0163-1829
VL - 98
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
IS - 17
M1 - 174405
ER -