TY - JOUR
T1 - Pressure versus magnetic-field tuning of a magnetic quantum phase transition
AU - Stockert, O.
AU - Huster, F.
AU - Neubert, A.
AU - Pfleiderer, C.
AU - Pietrus, T.
AU - Will, B.
AU - Löhneysen, H. V.
N1 - Funding Information:
This work was supported by the Deutsche Forschungsgemeinschaft and the European Science Foundation through the FERLIN program.
PY - 2002/3
Y1 - 2002/3
N2 - The low temperature properties of CeCu6-xAux show different behavior at the quantum phase transition depending on how the long-range antiferromagnetic order is suppressed. Tuning by hydrostatic pressure p results in a temperature dependence of the specific heat C(T) and the electrical resistivity ρ(T) as C/T = aln(T0/T) and ρ ≈ ρ0 + A′T, while C/T = γ0 - a′T0.5 and ρ ≈ ρ0 + A″T1.5 when tuned by applying a magnetic field B. The magnetic (p,T) and (B,T) phase diagrams as inferred from specific heat, electrical resistivity and neutron diffraction measurements are distinctly different. These findings suggest that the spectra of the low-lying magnetic fluctuations near these quantum phase transitions differ.
AB - The low temperature properties of CeCu6-xAux show different behavior at the quantum phase transition depending on how the long-range antiferromagnetic order is suppressed. Tuning by hydrostatic pressure p results in a temperature dependence of the specific heat C(T) and the electrical resistivity ρ(T) as C/T = aln(T0/T) and ρ ≈ ρ0 + A′T, while C/T = γ0 - a′T0.5 and ρ ≈ ρ0 + A″T1.5 when tuned by applying a magnetic field B. The magnetic (p,T) and (B,T) phase diagrams as inferred from specific heat, electrical resistivity and neutron diffraction measurements are distinctly different. These findings suggest that the spectra of the low-lying magnetic fluctuations near these quantum phase transitions differ.
KW - Heavy-fermion systems
KW - Quantum phase transition
UR - http://www.scopus.com/inward/record.url?scp=0036503497&partnerID=8YFLogxK
U2 - 10.1016/S0921-4526(01)01142-5
DO - 10.1016/S0921-4526(01)01142-5
M3 - Conference article
AN - SCOPUS:0036503497
SN - 0921-4526
VL - 312-313
SP - 458
EP - 460
JO - Physica B: Condensed Matter
JF - Physica B: Condensed Matter
T2 - International Conference on Strongly Correlated Electrons
Y2 - 6 August 2002 through 6 August 2002
ER -