TY - JOUR
T1 - Field-tuned critical fluctuations in YFe2Al10
T2 - Evidence from magnetization, 27Al NMR, and NQR investigations
AU - Khuntia, P.
AU - Strydom, A. M.
AU - Wu, L. S.
AU - Aronson, M. C.
AU - Steglich, F.
AU - Baenitz, M.
PY - 2012/12/6
Y1 - 2012/12/6
N2 - We report magnetization, specific heat, and NMR investigations on YFe 2Al10 over a wide range of temperature and magnetic field and zero field (NQR) measurements. Magnetic susceptibility, specific heat, and spin-lattice relaxation rate divided by T(1/T1T) follow a weak power law (∼T-0.4) temperature dependence, which is a signature of the critical fluctuations of Fe moments. The value of the Sommerfeld-Wilson ratio and the linear relation between 1/T1T and χ suggest the existence of ferromagnetic correlations in this system. No magnetic ordering down to 50 mK in Cp(T)/T and the unusual T and H scaling of the bulk and NMR data are associated with a magnetic instability which drives the system to quantum criticality. The magnetic properties of the system are tuned by field wherein ferromagnetic fluctuations are suppressed and a crossover from quantum critical to Fermi-liquid behavior is observed with increasing magnetic field.
AB - We report magnetization, specific heat, and NMR investigations on YFe 2Al10 over a wide range of temperature and magnetic field and zero field (NQR) measurements. Magnetic susceptibility, specific heat, and spin-lattice relaxation rate divided by T(1/T1T) follow a weak power law (∼T-0.4) temperature dependence, which is a signature of the critical fluctuations of Fe moments. The value of the Sommerfeld-Wilson ratio and the linear relation between 1/T1T and χ suggest the existence of ferromagnetic correlations in this system. No magnetic ordering down to 50 mK in Cp(T)/T and the unusual T and H scaling of the bulk and NMR data are associated with a magnetic instability which drives the system to quantum criticality. The magnetic properties of the system are tuned by field wherein ferromagnetic fluctuations are suppressed and a crossover from quantum critical to Fermi-liquid behavior is observed with increasing magnetic field.
UR - http://www.scopus.com/inward/record.url?scp=84871071315&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.86.220401
DO - 10.1103/PhysRevB.86.220401
M3 - Article
AN - SCOPUS:84871071315
SN - 1098-0121
VL - 86
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 22
M1 - 220401
ER -